title: How can I subscribe to a page's updates on Facebook?
body: <p>According to the "Real Time Updates" heading on the page reference in the Facebook graph API (<a href="https://developers.facebook.com/docs/reference/api/page/" rel="nofollow">https://developers.facebook.com/docs/reference/api/page/</a>), I should call <a href="https://graph.facebook.com/PAGE_ID/tabs" rel="nofollow">https://graph.facebook.com/PAGE_ID/tabs</a> with a POST request to be able to subscribe to a page's events. However, when I do that in the Graph API Explorer (and my app as well), I get an error like this:</p>
  
  <p>One and only one of params "tab" or "app_id" must be provided.</p>
  
  <p>This doesn't make sense because Facebook would have no way of knowing which application is trying to subscribe to this page's events.</p>
  
  <p>I should also note that I'm making this request after first setting the access token to the page's access token, and getting the manage_pages permission from the user.</p>
  
  <p>Thanks in advance.</p>