gistfile1.txt

{
    "application_id": "YOUR_APP_ID",
    "v": 1.21,
    "src": "https://s3.amazonaws.com/blitdoc/docx/Document+2.docx",
    "src_type": "smart_image",
    "src_data": {
        "dpi": 200
    },
    "functions": [
        {
            "name": "resize_to_fit",
            "params": {
                "width": 500
            },
            "functions": [
                {
                    "name": "trim",
                    "params": {
                        "width": 500
                    },
                    "save": {
                        "extension": "png",
                        "image_identifier": "MY_CLIENT_ID"
                    }
                }
            ]
        }
    ]
}