title: Organize model and collection in backbone
body: <p>I have a JSON response with the following structure:</p>
  
  <pre><code>{
      id: 1,
      status: 0,
      created_at: "Y:m:d H:m:s",
      updated_at "Y:m:d H:m:s)",
      order_items: [items]
  }
  </code></pre>
  
  <p>Could I make a collection with it? The ID, status etc. are just metadata. Or should I create  new <code>ItemsCollection</code> for the items array? Also will I get notified when an item changed?</p>