title: Requesting JSON response from facebook Graph API
body: <p>This might be a very simple question, but I just need to have a JSON response from Facebook for ths query</p>
  
  <p><a href="https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&amp;client_id=" rel="nofollow">https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&amp;client_id=</a>'my app id'&amp;client_secret='my secret id'&amp;fb_exchange_token='old_token'</p>
  
  <p>This works and returns a response with a long term Facebook token. But I just need to have the response in JSON format. How can I do that?</p>