Problem uploading Image with Django Rest Framework and Xamarin Forms

In the ViewModel I get the image in an array of bytes and add it to a MultipartDataContent.

byte[] imageArray = null;
            ByteArrayContent imageStream= null;
            if (this.file != null)
            {
                imageArray = FilesHelper.ReadFully(this.file.GetStream());
                imageStream = new ByteArrayContent(imageArray);
                imageStream.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
                {
                    FileName = Guid.NewGuid() + ".Png"
                };

            }
            this.FechaInicio = this.DateSelected.Year + "-" + this.DateSelected.Month + "-" + this.DateSelected.Day;
            this.FechaFin = this.DateSelectedFin.Year + "-" + this.DateSelectedFin.Month + "-" + this.DateSelectedFin.Day;
            this.Fecha = DateTime.Today.Year + "-" + DateTime.Today.Month + "-" + DateTime.Today.Day;
            Comunicado comunicado = new Comunicado { Fecha_inicio=this.FechaInicio, Fecha_fin= this.FechaFin,
                Contenido = this.Contenido,Tipo= this.TipoSelectedIndex, Asunto= this.Asunto, Fecha_creacion= fecha, Materia=selectedMateria.Id,User_id=1,Path= imageArray };
            this.IdColegio = 1;
            MainViewModel.GetInstance().ComunicadoCursos = new ComunicadoCursosViewModel(comunicado,this.IdColegio);
            Application.Current.MainPage = new ComunicadoCursosPage();
            return;

Send method in which I send the image within the class Communicated in the Path attribute

private async void Enviar()
    {
        var connection = await this.apiService.CheckConnection();
        if (!connection.IsSuccess)
        {
            await Application.Current.MainPage.DisplayAlert(
                "Error",
                connection.Message,
                "Accept");
            await Application.Current.MainPage.Navigation.PopAsync();
            return;
        }
        Comunicados.Prioridad = PrioridadSelectedIndex + 1;
        var response = await this.apiService.Post<Comunicado>(
            MainViewModel.GetInstance().BaseUrl,
            "/comunicado",
            "/api/v1/listar",
            Comunicados);
        if (!response.IsSuccess)
        {
            await Application.Current.MainPage.DisplayAlert(
                    "Error",
                    response.Message,
                    "Accept"
                );
            return;
        }
        await Application.Current.MainPage.DisplayAlert(
                            "Mensaje",
                            "Registrado correctamente",
                            "Accept");
        //MainViewModel.GetInstance().AgendaMedico = new AgendaMedicoViewModel(this.idMedico);
        //Application.Current.MainPage = new NavigationPage(new AgendaMedicoPage());
        return;

    }

The file Comunicado.cs

public class Comunicado
{

    [JsonProperty(PropertyName = "id")]
    public int Id { get; set; }
    [JsonProperty(PropertyName = "prioridad")]
    public int Prioridad { get; set; }
    [JsonProperty(PropertyName = "fecha_inicio")]
    public string Fecha_inicio { get; set; }
    [JsonProperty(PropertyName = "fecha_fin")]
    public string Fecha_fin { get; set; }
    [JsonProperty(PropertyName = "contenido")]
    public string Contenido { get; set; }
    [JsonProperty(PropertyName = "path")]
    public byte[] Path { get; set; }
    [JsonProperty(PropertyName = "tipo")]
    public int Tipo { get; set; }
    [JsonProperty(PropertyName = "asunto")]
    public string Asunto { get; set; }
    [JsonProperty(PropertyName = "fecha_creacion")]
    public string Fecha_creacion { get; set; }
    [JsonProperty(PropertyName = "user_id")]
    public int User_id { get; set; }
    [JsonProperty(PropertyName = "materia")]
    public int Materia { get; set; }
}

Models.py File

class Comunicado(models.Model):
PRIORIDAD_CHOICES = (
    (1, ("Urgente")),
    (2, ("Medio")),
    (3, ("Normal"))
)
TIPO_CHOICES = (
    (1, ("Comunicado")),
    (2, ("Evento"))
)
prioridad = models.IntegerField(choices=PRIORIDAD_CHOICES, default=1)
fecha_inicio = models.DateField()
fecha_fin = models.DateField()
contenido = models.TextField()
path = models.ImageField(upload_to=comunicado_directory_path, blank=True, null=True,default='comunicado/cancel.png',max_length=5000)
tipo = models.IntegerField(choices=TIPO_CHOICES, default=1)
asunto = models.CharField(max_length=100)
fecha_creacion = models.DateField(default= date.today)
user_id = models.ForeignKey(User , null=True, blank=True, on_delete=models.CASCADE)
materia = models.ForeignKey(Materia , null=True, blank=True, on_delete=models.CASCADE)
curso = models.ManyToManyField(Curso, through='CursoComunicado')
def __str__(self):
    return self.asunto

View.py file

class ListComunicado(APIView):

def get(self, request):
    comunicado = Comunicado.objects.all()
    comunicado_json = ComunicadoSerializer(comunicado, many=True)
    return Response(comunicado_json.data)

def post(self, request):
    try:
        file = request.data['path']
        fecha_inicio = request.data['fecha_inicio']
        fecha_fin = request.data['fecha_fin']
        contenido = request.data['contenido']
        tipo = request.data['tipo']
        asunto = request.data['asunto']
        fecha_creacion = request.data['fecha_creacion']
        materia = request.data['materia']
        user_id = request.data['user_id']
        prioridad = request.data['prioridad']
    except KeyError:
        print("Error")
    rawbytes = bytes(file, 'utf-8')
    print(rawbytes)
    image_bytes = Image.open(io.BytesIO(rawbytes))
    pil_image = Image.open(image_bytes)
    pil_image.verify()
    user = User.objects.get(pk = user_id)
    materia = Materia.objects.get(pk = materia)
    comunicado = Comunicado.objects.create(path = pil_image, prioridad = prioridad, fecha_inicio = fecha_inicio, fecha_fin = fecha_fin,
                                           contenido = contenido, tipo = tipo, asunto = asunto, fecha_creacion = fecha_creacion,
                                           user_id = user, materia = materia)

I get the array of bytes in the file variable

Serializers.py Files

class ComunicadoSerializer(serializers.ModelSerializer):
path = serializers.ImageField(max_length=None, use_url=True)
class Meta:
    model = Comunicado
    fields = ('id','prioridad','fecha_inicio','fecha_fin','contenido','path', 'tipo', 'asunto', 'fecha_creacion', 'user_id', 'materia')

I am trying to convert the array of bytes into an image. With the python PIL library but I get the following error.

  

Traceback (most recent call last): File   "D: \ DjangoProjects \ venv \ lib \ site-packages \ django \ core \ handlers \ exception.py",   line 35, in inner       response = get_response (request) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ django \ core \ handlers \ base.py",   line 128, in _get_response       response = self.process_exception_by_middleware (e, request) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ django \ core \ handlers \ base.py",   line 126, in _get_response       response = wrapped_callback (request, * callback_args, ** callback_kwargs) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ django \ views \ decorators \ csrf.py",   line 54, in wrapped_view       return view_func (* args, ** kwargs) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ django \ views \ generic \ base.py",   line 69, in view       return self.dispatch (request, * args, ** kwargs) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ rest_framework \ views.py",   line 483, in dispatch       response = self.handle_exception (exc) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ rest_framework \ views.py",   line 443, in handle_exception       self.raise_uncaught_exception (exc) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ rest_framework \ views.py",   line 480, in dispatch       response = handler (request, * args, ** kwargs) File "D: \ DjangoProjects \ venv \ webweb \ apps \ statement \ views.py", line 44,   in post       image_bytes = Image.open (io.BytesIO (rawbytes)) File "D: \ DjangoProjects \ venv \ lib \ site-packages \ PIL \ Image.py", line 2622, in   open       % (filename if filename else fp)) OSError: can not identify image file