FedEx-REST - Label Ground Collect (Not COD)

{
  "carrier": "FedEx-REST",
  "action": "SubmitShipment",
  "params": {
    "key": "your-key-from-authenticate-request",
    "billing": [
      {
        "type": "transportation",
        "payment_type": "collect",
        "account": "abc123"
      }
    ],
    "packages": [
      {
        "width": 14,
        "length": 11,
        "height": 8,
        "weight": 5,
        "reference_code": "P_O_NUMBER",
        "reference_value": "abc123",
        "reference_code2": "CUSTOMER_REFERENCE",
        "reference_value2": "123456"
      }
    ],
    "shipper": "Acme Inc",
    "ship_addr1": "123 Main St.",
    "ship_city": "Vancouver",
    "ship_state": "WA",
    "ship_code": "98685",
    "ship_phone": "123-123-1234",
    "ship_country": "US",
    "to_country": "US",
    "to_code": "11040",
    "to_name": "Big Box Store",
    "to_addr1": "123 Fake St.",
    "to_state": "NY",
    "to_city": "New Hyde Park",
    "packaging_type": "YOUR_PACKAGING",
    "test": true
  }
}

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'FedEx-REST',
  'action' => 'SubmitShipment',
  'params' => 
  array (
    'key' => 'your-key-from-authenticate-request',
    'billing' => 
    array (
      0 => 
      array (
        'type' => 'transportation',
        'payment_type' => 'collect',
        'account' => 'abc123',
      ),
    ),
    'packages' => 
    array (
      0 => 
      array (
        'width' => 14,
        'length' => 11,
        'height' => 8,
        'weight' => 5,
        'reference_code' => 'P_O_NUMBER',
        'reference_value' => 'abc123',
        'reference_code2' => 'CUSTOMER_REFERENCE',
        'reference_value2' => '123456',
      ),
    ),
    'shipper' => 'Acme Inc',
    'ship_addr1' => '123 Main St.',
    'ship_city' => 'Vancouver',
    'ship_state' => 'WA',
    'ship_code' => '98685',
    'ship_phone' => '123-123-1234',
    'ship_country' => 'US',
    'to_country' => 'US',
    'to_code' => '11040',
    'to_name' => 'Big Box Store',
    'to_addr1' => '123 Fake St.',
    'to_state' => 'NY',
    'to_city' => 'New Hyde Park',
    'packaging_type' => 'YOUR_PACKAGING',
    'test' => true,
  ),
)
);

rs.request(
  {'action': 'SubmitShipment',
 'carrier': 'FedEx-REST',
 'params': {'billing': [{'account': 'abc123',
                         'payment_type': 'collect',
                         'type': 'transportation'}],
            'key': 'your-key-from-authenticate-request',
            'packages': [{'height': 8,
                          'length': 11,
                          'reference_code': 'P_O_NUMBER',
                          'reference_code2': 'CUSTOMER_REFERENCE',
                          'reference_value': 'abc123',
                          'reference_value2': '123456',
                          'weight': 5,
                          'width': 14}],
            'packaging_type': 'YOUR_PACKAGING',
            'ship_addr1': '123 Main St.',
            'ship_city': 'Vancouver',
            'ship_code': '98685',
            'ship_country': 'US',
            'ship_phone': '123-123-1234',
            'ship_state': 'WA',
            'shipper': 'Acme Inc',
            'test': True,
            'to_addr1': '123 Fake St.',
            'to_city': 'New Hyde Park',
            'to_code': '11040',
            'to_country': 'US',
            'to_name': 'Big Box Store',
            'to_state': 'NY'}}

)

rs.request(
  {"carrier"=>"FedEx-REST",
 "action"=>"SubmitShipment",
 "params"=>
  {"key"=>"your-key-from-authenticate-request",
   "billing"=>
    [{"type"=>"transportation",
      "payment_type"=>"collect",
      "account"=>"abc123"}],
   "packages"=>
    [{"width"=>14,
      "length"=>11,
      "height"=>8,
      "weight"=>5,
      "reference_code"=>"P_O_NUMBER",
      "reference_value"=>"abc123",
      "reference_code2"=>"CUSTOMER_REFERENCE",
      "reference_value2"=>"123456"}],
   "shipper"=>"Acme Inc",
   "ship_addr1"=>"123 Main St.",
   "ship_city"=>"Vancouver",
   "ship_state"=>"WA",
   "ship_code"=>"98685",
   "ship_phone"=>"123-123-1234",
   "ship_country"=>"US",
   "to_country"=>"US",
   "to_code"=>"11040",
   "to_name"=>"Big Box Store",
   "to_addr1"=>"123 Fake St.",
   "to_state"=>"NY",
   "to_city"=>"New Hyde Park",
   "packaging_type"=>"YOUR_PACKAGING",
   "test"=>true}}

)

rocketshipit.request(
  {
  "carrier": "FedEx-REST",
  "action": "SubmitShipment",
  "params": {
    "key": "your-key-from-authenticate-request",
    "billing": [
      {
        "type": "transportation",
        "payment_type": "collect",
        "account": "abc123"
      }
    ],
    "packages": [
      {
        "width": 14,
        "length": 11,
        "height": 8,
        "weight": 5,
        "reference_code": "P_O_NUMBER",
        "reference_value": "abc123",
        "reference_code2": "CUSTOMER_REFERENCE",
        "reference_value2": "123456"
      }
    ],
    "shipper": "Acme Inc",
    "ship_addr1": "123 Main St.",
    "ship_city": "Vancouver",
    "ship_state": "WA",
    "ship_code": "98685",
    "ship_phone": "123-123-1234",
    "ship_country": "US",
    "to_country": "US",
    "to_code": "11040",
    "to_name": "Big Box Store",
    "to_addr1": "123 Fake St.",
    "to_state": "NY",
    "to_city": "New Hyde Park",
    "packaging_type": "YOUR_PACKAGING",
    "test": true
  }
}
)