6-sec14.html#sec14.43">User-Agent</a></code> MUST be specified.</li>
      <li>For HTTP POST only, the <code><a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a></code> MUST be specified and SHOULD read <code>application/json</code>.</li>
      <li>The <code><a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.13">Content-Length</a></code> MUST be specified and correct according
            to the guidelines and rules laid out in <a href="http://www.w3.