Perform signature capture and save it on android device using xamarin

This is my code, but I do not know how to save the signature to my Android device.

using SignaturePad.Forms;

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Xamarin.Forms;

namespace Signature1 {

public partial class MainPage : ContentPage
{

    public MainPage()
    {
        InitializeComponent();
        Guardar.Clicked += Guardar_Clicked;
        Limpiar.Clicked += Limpiar_Clicked;
    }

    private void Limpiar_Clicked(object sender, EventArgs e)
    {
        PadView.Clear();
    }

    private async void Guardar_Clicked(object sender, EventArgs e)
    {

        Stream image = await PadView.GetImageStreamAsync(SignatureImageFormat.Jpeg);
    }
}

}