"private_key": "-----BEGIN PRIVATE KEY-----veryLongKey---END PRIVATE KEY-----n",
"client_email": "randomemail@appspot.gserviceaccount.com",

$url = 'https://localhost-42d67.firebaseio.com/Devices.json?auth=' .$theCreatedToken;
    $arr = array("success" =>array("iPhone"=>500));
    $data_string = json_encode($arr);
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PATCH");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data_string))
    );
echo $result = curl_exec($ch);