title: PolymerJS POST JSON formatting
body: <p>I am trying to POST using PolymerJS ajax-forms and I encounter a weird JSON format error. Can someone tell me why the  quotes are missing around the keys? The only workaround I can think of is manually constructing the body with the quotes around the keys.</p>
  
  <p>Code Snippet :
  How I receive the values (rest are the same with the ids changed):</p>
  
  <pre><code>&lt;div&gt;
          &lt;paper-input label="Title" id="course-title" floatingLabel value="{{item.title}}"&gt;&lt;/paper-input&gt;
      &lt;/div&gt;
  
   &lt;access-core-ajax
                auto = "false"
                url="domain/courses"
                response="{{response}}"
                method="post"
                id="postCourse"
                contentType="application/json"
                headers='{"Accept": "application/json", "Content-Type":"application/json"}',
                body = "{{item}}"&gt;
  
              &lt;template id="get-response-template" repeat="{{item in response.entries}}"&gt;
                      &lt;p&gt;Errors&lt;/p&gt;
              &lt;/template&gt;
          &lt;/access-core-ajax&gt;
  
  Polymer('create-new-course-page',{
          domReady: function() {
              console.log("Log: create-new-courses-page - Looks like we are domReady");
          },
          created: function() {
              console.log("Item initialized");
              this.item = {};
              this.data={};
          },
          createNewCourse: function(event) {
              console.log("HERE IS BODY", this.item);
              this.$.postCourse.go();
  
  
         }
  </code></pre>
  
  <p>And the JSON is see on the log:</p>
  
  <blockquote>
    <p>{
    title: "WRU",
    // rest of key &amp; values, where the keys are without the ""
    }</p>
  </blockquote>