title: FCM silent push notification structure for iOS?
body: <p>I need example of notification payload for silent notification, I tried this below structure, but it's not working</p>
  
  <pre><code>{ 
      "notification" : {
          "body" : " Survey list updated",
          "content-available:" : true,
          "data" : {
              "isNewUpdateAvailable" : "easysurvey.survey_list_updated"
              }
          },
          "to" : "f6PwToRUxk0:APA91bG7bSWoKsjHXVmXaiDEnFXA2x2jEOMSO6eGCqPv1fRd-dctNLDEabRq-0So_obuPGFqOFTSLJl5FFyuOuXKBXh-n89BmzzXenRTxoirY9Y1c6-J9MxpDp0ojHL2xm1law0V6gg3"
  }
  </code></pre>
  
  <p>Using this structure, I am able to receive notifications, but it's not silent &amp; doesn't wake the app.
  i need solution for firebase notification &amp; on iOS 10,
  i am following same <a href="https://github.com/firebase/quickstart-ios/blob/master/messaging/MessagingExampleSwift/AppDelegate.swift" rel="nofollow noreferrer">firebase sample</a> code</p>