title: How to monitor an action by user on Glass
body: <p>I have a mirror API based app in which i have assigned a custom menu item, clicking on which should insert a new card. I have a bit of problem in doing that. I need to know of ways i can debug this. </p>
  
  <ol>
  <li>Check if the subscription to the glass timeline was successful.</li>
  <li>Print out something on console on click of the menu.</li>
  <li>Any other way i can detect whether on click of the menu, the callback URL was called or not.</li>
  </ol>