post.json

{
    "broadcast": {
        "interest_id": 38,
        "headline": "How about this",
        "body": "Image?",
        "response_options_attributes": {
            "0": {
                "text": ""
            },
            "1": {
                "text": ""
            },
            "2": {
                "text": ""
            }
        },
        "image": {
            "_isFile": true,
            "data": {
                "size": 66265,
                "type": "image/jpeg"
            },
            "name": "upload.jpg"
        }
    },
    "token": "6DiuXzp8dAdnnZeQFHkB"
}