send JSON to angle controller

Greetings, I am creating an editing environment for use cases, I use the FabricJS library. To create the elements of the diagram I use the following code: (I use images)

var canvas = new fabric.Canvas('pizarra');
var HideControls = {
        'tl':true,
        'tr':false,
        'bl':true,
        'br':true,
        'ml':true,
        'mt':true,
        'mr':true,
        'mb':true,
        'mtr':true
    };

$("#actor").on("click", function(e) {
    fabric.Image.fromURL('app-content/icons/actor.svg', function (img) {
            img.top = 60;
            img.left = 30;
            img.width = 31;
            img.height = 70;
            img.setControlsVisibility(HideControls);
            canvas.add(img);  
      });
});

$("#CU").on("click", function(e) {
    fabric.Image.fromURL('app-content/icons/CU.svg', function (img) {
            img.top = 60;
            img.left = 30;
            img.width = 130;
            img.height = 60;
            canvas.add(img);
      });
});

Next, I create the save () function that converts the diagram elements into JSON code:

function save() {

var data = canvas.toJSON();  
var string  = JSON.stringify(data);

//JSON en array
//console.log(data.objects);


//cadena de texto 
console.log(string);

//return data.objects;
}

My question is this: I need to get the JSON created in the save () function in the angle controller, I would like to know if there is any way to do this?

Thank you very much.