can't change the message title

[Mostafa Khattab]

thanks, Louis for your great effort I did some tweak to split the client area and save the subscription in the database, but still couldn't find out how the change the notification title dynamically
her is my code in the (send_push_notification.php)
`foreach ($notifications as $notification) {

$webPush->sendNotification(
    $notification['subscription'],
    $notification['payload'],
    false,
    array('topic'=>'my topic')
);

}
$webPush->flush();
and this is how i try to get the title in (serviceWorker.js)return self.registration.showNotification(event.data.topic, {
body: body,
icon: 'https://vignette.wikia.nocookie.net/plantsvszombies/images/9/9c/Pvz2_icon.png/revision/latest?cb=20140621162342',
vibrate: [200, 100, 200, 100, 200, 100, 200],
tag: 'vibration-sample'
});`

[Mostafa Khattab]

Done I sent the title in the payload as a JSON format