NaiveServiceWithLogic.kt

override fun onMessageReceived(remoteMessage: RemoteMessage) {
    val title = remoteMessage.data["title"]
    val body = remoteMessage.data["body"]
    val deeplink = remoteMessage.data["deeplink"]

    val intent = Intent(Intent.ACTION_VIEW, Uri.parse(deeplink))
    val notification = NotificationCompat.Builder(this, "channel_id")
        .setContentTitle(title)
        .setContentText(body)
        .setContentIntent(PendingIntent.getActivity(this, 0, intent, 0))
        .build()

    NotificationManagerCompat.from(this).notify(1, notification)
}