JSON Data to send Push Notification to all of the registered devices using Firebase
<p>This is the JSON structure when I need to send the notification to specific device using Firebase. So how should I modify it to send the same notification to all of the devices or couple of selected devices?</p>

<pre><code>{ "notification": {
    "title": "Quiz App",
    "text": "Your Quiz has submitted Successfully."
  },
  "to" : "Unique Key"
}
</code></pre>

<p>What will be the JSON structure for sending the push notification to all of the devices using Firebase in android?</p>