Проблема со звуком уведомлений FCM Android

Я пытаюсь отправить уведомление с помощью php в приложение Android, и оно отлично работает без звука. Я получаю уведомление как на переднем плане, так и на заднем плане, как и ожидалось.

Вот код PHP,

<?php


$token = $_GET['token'];
$action = $_GET['action'];
$msgTitle = $_GET['msgTitle'];
$msgDescription = $_GET['msgDescription'];
$notificationTitle = $_GET['notificationTitle'];


require './google-api-php-client-2.2.2/vendor/autoload.php';
$client = new Google_Client();
$client->useApplicationDefaultCredentials(); 
$client->setAuthConfig('./testPrjoectAPP-firebase-adminsdk-9hn21-22c1b3f426.json');
$client->addScope('https://www.googleapis.com/auth/firebase.messaging');
$httpClient = $client->authorize();
$project = "testPrjoectAPP";
$message = [
    "message" => [
        "notification" => [
            "body"  => "Message FCM",
            "title" => $notificationTitle
        ],
        "token" => $token,

       "data" => [
                "action" => $action,
            "msgTitle" => $msgTitle,
            "msgDescription" => $msgDescription 
         ]


    ]
];
$response = $httpClient->post("https://fcm.googleapis.com/v1/projects/{$project}/messages:send", ['json' => $message]);
echo$response->getReasonPhrase(); // OK

?>

Но когда я добавляю звуковой параметр в полезную нагрузку уведомления и выполняю php, я получаю ошибку Bad Request от php. .

$message = [
    "message" => [
        "notification" => [
            "body"  => "Message FCM",
            "title" => $notificationTitle,
            "sound" => "default"    
        ],
        // Send with token is not working
        "token" => $token,

       "data" => [
            "action" => $action,
            "msgTitle" => $msgTitle,
            "msgDescription" => $msgDescription
         ]


    ]
];

Редактировать

Вот сообщение об ошибке, которое я получил при печати с

data: "{\n \"error\": {\n \"code\": 400,\n \"message\": \"Invalid JSON payload received. Unknown name \\\"sound\\\" at 'message.notification': Cannot find field.\",\n \"status\": \"INVALID_ARGUMENT\",\n \"details\": [\n {\n \"@type\": \"type.googleapis.com/google.rpc.BadRequest\",\n \"fieldViolations\": [\n {\n \"field\": \"message.notification\",\n \"description\": \"Invalid JSON payload received. Unknown name \\\"sound\\\" at 'message.notification': Cannot find field.\"\n }\n ]\n }\n ]\n }\n}\n"