title: Cannot get specific value attribute from list of value attributes
body: <p>I have a checkbox that I need to control, but first I need to see whether it is checked or not before continuing. The only HTML that seems to change when I click on the checkbox is this: -</p>
  
  <pre><code>&lt;input type="hidden" class="final-json" name="defaults" value="
  {"force_change_projects":{"enabled":false},"coverage":
  {"regions":"coding_only","buffer_length":20},"acmg":
  {"enabled":true},"double_user_check":{"enabled":true},"other_coverage":
  {"default_depth":20,"coverage":[20],"locked":false}}"&gt;
  </code></pre>
  
  <p>The value attribute that I need is <code>"double_user_check":{"enabled":true}</code> and each time I click the checkbox the enabled state changes accordingly. I can get the whole value attribute, but I need to get just the  double_user_check attribute from it. I just can't seem to get it though. </p>
  
  <p>So I need to check the enabled/disabled state of the <code>double_user_check</code> value.</p>