FedEx-REST - Upload Images

{
  "carrier": "FedEx-REST",
  "action": "uploadimages",
  "params": {
    "test": true,
    "key": "your-key-from-authenticate-request",
    "images": [
      {
        "id": "IMAGE_1",
        "mime_type": "image/png",
        "type": "SIGNATURE",
        "content": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII="
      }
    ]
  }
}

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'FedEx-REST',
  'action' => 'uploadimages',
  'params' => 
  array (
    'test' => true,
    'key' => 'your-key-from-authenticate-request',
    'images' => 
    array (
      0 => 
      array (
        'id' => 'IMAGE_1',
        'mime_type' => 'image/png',
        'type' => 'SIGNATURE',
        'content' => 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=',
      ),
    ),
  ),
)
);

rs.request(
  {'action': 'uploadimages',
 'carrier': 'FedEx-REST',
 'params': {'images': [{'content': 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=',
                        'id': 'IMAGE_1',
                        'mime_type': 'image/png',
                        'type': 'SIGNATURE'}],
            'key': 'your-key-from-authenticate-request',
            'test': True}}

)

rs.request(
  {"carrier"=>"FedEx-REST",
 "action"=>"uploadimages",
 "params"=>
  {"test"=>true,
   "key"=>"your-key-from-authenticate-request",
   "images"=>
    [{"id"=>"IMAGE_1",
      "mime_type"=>"image/png",
      "type"=>"SIGNATURE",
      "content"=>
       "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII="}]}}

)

rocketshipit.request(
  {
  "carrier": "FedEx-REST",
  "action": "uploadimages",
  "params": {
    "test": true,
    "key": "your-key-from-authenticate-request",
    "images": [
      {
        "id": "IMAGE_1",
        "mime_type": "image/png",
        "type": "SIGNATURE",
        "content": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII="
      }
    ]
  }
}
)