title: How to configure Facebook webhooks?
body: <p>I want to configure <a href="https://developers.facebook.com/docs/graph-api/webhooks" rel="noreferrer">Facebook webhooks</a> for the application I'm developing.</p>
  
  <p>What I did so far was:</p>
  
  <ol>
  <li>Create FB app</li>
  <li>Go to app settings and create a new webhook:
  
  <ol>
  <li>Add a valid callback URLs</li>
  <li>Choose particular fields</li>
  </ol></li>
  <li>Successfully save the settings</li>
  </ol>
  
  <p>Now, when I'm querying for page subscriptions I get the response:</p>
  
  <pre><code>{
    "data": [
      {
        "object": "page",
        "callback_url": "CALLBACK_URL",
        "fields": [
          "feed"
        ],
        "active": true
      }
    ]
  }
  </code></pre>
  
  <p>which seems to be valid.</p>
  
  <p>What should I do next? How to start listening from feed of a particular page?</p>