title: How can i get html-escaped JSON data of unescaped JSON content
body: <p>How can i get the html-escaped JSON data of this </p>
  
  <pre><code>{ "timestamp":  1345719094, 
    "callback": "https://www.example.com/cloudinary_cors.html",
    "signature": "7ac8c757e940d95f95495aa0f1cba89ef1a8aa7a", 
    "api_key": "1234567890" }
  </code></pre>
  
  <p>for using it like this :</p>
  
  <pre><code>&lt;input name="file" type="file" 
         class="cloudinary-fileupload" data-cloudinary-field="image_upload" 
         data-form-data=" ... html-escaped JSON data ... " &gt;&lt;/input&gt;
  </code></pre>
  
  <p>How can i do it in HTML and javascript ?</p>
  
  <p>In advance thanks.</p>