FedEx-REST - Tracking by Reference without account

{
  "carrier": "FedEx-REST",
  "action": "track",
  "params": {
    "key": "your-key-from-authenticate-request",
    "tracking_number": "318511",
    "tracking_id_type": "PURCHASE_ORDER",
    "carrier_code": "FDXE",
    "to_country": "US",
    "to_code": "01835",
    "ship_date_begin": "2024-05-01",
    "ship_date_end": "2024-05-24"
  }
}

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'FedEx-REST',
  'action' => 'track',
  'params' => 
  array (
    'key' => 'your-key-from-authenticate-request',
    'tracking_number' => '318511',
    'tracking_id_type' => 'PURCHASE_ORDER',
    'carrier_code' => 'FDXE',
    'to_country' => 'US',
    'to_code' => '01835',
    'ship_date_begin' => '2024-05-01',
    'ship_date_end' => '2024-05-24',
  ),
)
);

rs.request(
  {'action': 'track',
 'carrier': 'FedEx-REST',
 'params': {'carrier_code': 'FDXE',
            'key': 'your-key-from-authenticate-request',
            'ship_date_begin': '2024-05-01',
            'ship_date_end': '2024-05-24',
            'to_code': '01835',
            'to_country': 'US',
            'tracking_id_type': 'PURCHASE_ORDER',
            'tracking_number': '318511'}}

)

rs.request(
  {"carrier"=>"FedEx-REST",
 "action"=>"track",
 "params"=>
  {"key"=>"your-key-from-authenticate-request",
   "tracking_number"=>"318511",
   "tracking_id_type"=>"PURCHASE_ORDER",
   "carrier_code"=>"FDXE",
   "to_country"=>"US",
   "to_code"=>"01835",
   "ship_date_begin"=>"2024-05-01",
   "ship_date_end"=>"2024-05-24"}}

)

rocketshipit.request(
  {
  "carrier": "FedEx-REST",
  "action": "track",
  "params": {
    "key": "your-key-from-authenticate-request",
    "tracking_number": "318511",
    "tracking_id_type": "PURCHASE_ORDER",
    "carrier_code": "FDXE",
    "to_country": "US",
    "to_code": "01835",
    "ship_date_begin": "2024-05-01",
    "ship_date_end": "2024-05-24"
  }
}
)