title: Add object into property of another object dynamically
body: <p>I have an Object inside AJAX call and I'm not able to add new property to its property containing another object. </p>
  
  <p>Here is my attempt:</p>
  
  <pre><code>$.post('/home/save.json', {obj:obj}, function(data) {
      var qu = {};
      qu["Id"] = "some value";
      qu["Type"] = "some value";
      qu["Name"] = "some value"
      qu["Variants"] = data["Variants"]
      if (data['Subvariant']) { 
          qu["Variants"]["Subvariant"] = data['Subvariant'] 
      }
      // ...
  });
  </code></pre>