Purolator - Label Signature Required

{
      "carrier": "Purolator",
      "action": "SubmitShipment",
      "params": {
        "username": "YOUR_USERNAME",
        "password": "YOUR_PASSWORD",
        "key": "YOUR_API_USER_TOKEN",
        "packages": [
          {
            "weight": 4,
            "length": 7,
            "width": 5,
            "height": 5,
            "signature_type": "DIRECT"
          }
        ],
        "service": "PurolatorGround",
        "shipper": "RocketShipIt",
        "ship_addr1": "5048 264 St",
        "ship_city": "Aldergrove",
        "ship_state": "BC",
        "ship_code": "V4W 1N7",
        "ship_phone": "1231231234",
        "ship_country": "CA",
        "to_name": "John Doe",
        "to_addr1": "5048 264 St, Aldergrove",
        "to_state": "BC",
        "to_city": "Aldergrove",
        "to_code": "V4W 1N7",
        "to_country": "CA",
        "image_type": "PDF",
        "test": true
      }
    }

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'Purolator',
  'action' => 'SubmitShipment',
  'params' => 
  array (
    'username' => 'YOUR_USERNAME',
    'password' => 'YOUR_PASSWORD',
    'key' => 'YOUR_API_USER_TOKEN',
    'packages' => 
    array (
      0 => 
      array (
        'weight' => 4,
        'length' => 7,
        'width' => 5,
        'height' => 5,
        'signature_type' => 'DIRECT',
      ),
    ),
    'service' => 'PurolatorGround',
    'shipper' => 'RocketShipIt',
    'ship_addr1' => '5048 264 St',
    'ship_city' => 'Aldergrove',
    'ship_state' => 'BC',
    'ship_code' => 'V4W 1N7',
    'ship_phone' => '1231231234',
    'ship_country' => 'CA',
    'to_name' => 'John Doe',
    'to_addr1' => '5048 264 St, Aldergrove',
    'to_state' => 'BC',
    'to_city' => 'Aldergrove',
    'to_code' => 'V4W 1N7',
    'to_country' => 'CA',
    'image_type' => 'PDF',
    'test' => true,
  ),
)
);

rs.request(
  {'action': 'SubmitShipment',
 'carrier': 'Purolator',
 'params': {'image_type': 'PDF',
            'key': 'YOUR_API_USER_TOKEN',
            'packages': [{'height': 5,
                          'length': 7,
                          'signature_type': 'DIRECT',
                          'weight': 4,
                          'width': 5}],
            'password': 'YOUR_PASSWORD',
            'service': 'PurolatorGround',
            'ship_addr1': '5048 264 St',
            'ship_city': 'Aldergrove',
            'ship_code': 'V4W 1N7',
            'ship_country': 'CA',
            'ship_phone': '1231231234',
            'ship_state': 'BC',
            'shipper': 'RocketShipIt',
            'test': True,
            'to_addr1': '5048 264 St, Aldergrove',
            'to_city': 'Aldergrove',
            'to_code': 'V4W 1N7',
            'to_country': 'CA',
            'to_name': 'John Doe',
            'to_state': 'BC',
            'username': 'YOUR_USERNAME'}}

)

rs.request(
  {"carrier"=>"Purolator",
 "action"=>"SubmitShipment",
 "params"=>
  {"username"=>"YOUR_USERNAME",
   "password"=>"YOUR_PASSWORD",
   "key"=>"YOUR_API_USER_TOKEN",
   "packages"=>
    [{"weight"=>4,
      "length"=>7,
      "width"=>5,
      "height"=>5,
      "signature_type"=>"DIRECT"}],
   "service"=>"PurolatorGround",
   "shipper"=>"RocketShipIt",
   "ship_addr1"=>"5048 264 St",
   "ship_city"=>"Aldergrove",
   "ship_state"=>"BC",
   "ship_code"=>"V4W 1N7",
   "ship_phone"=>"1231231234",
   "ship_country"=>"CA",
   "to_name"=>"John Doe",
   "to_addr1"=>"5048 264 St, Aldergrove",
   "to_state"=>"BC",
   "to_city"=>"Aldergrove",
   "to_code"=>"V4W 1N7",
   "to_country"=>"CA",
   "image_type"=>"PDF",
   "test"=>true}}

)

rocketshipit.request(
  {
      "carrier": "Purolator",
      "action": "SubmitShipment",
      "params": {
        "username": "YOUR_USERNAME",
        "password": "YOUR_PASSWORD",
        "key": "YOUR_API_USER_TOKEN",
        "packages": [
          {
            "weight": 4,
            "length": 7,
            "width": 5,
            "height": 5,
            "signature_type": "DIRECT"
          }
        ],
        "service": "PurolatorGround",
        "shipper": "RocketShipIt",
        "ship_addr1": "5048 264 St",
        "ship_city": "Aldergrove",
        "ship_state": "BC",
        "ship_code": "V4W 1N7",
        "ship_phone": "1231231234",
        "ship_country": "CA",
        "to_name": "John Doe",
        "to_addr1": "5048 264 St, Aldergrove",
        "to_state": "BC",
        "to_city": "Aldergrove",
        "to_code": "V4W 1N7",
        "to_country": "CA",
        "image_type": "PDF",
        "test": true
      }
    }
)