title: How can i change JSON object data with Greasemonkey
body: <p>A site that I'm using contains a JavaScript file, inside the file it contains a code with JSON and goes like this:</p>
  
  <pre><code>$.getJSON(API_URL + getSubdomain() + "/values");
  </code></pre>
  
  <p>The data file contains the code:</p>
  
  <pre><code>{"has_clicked_all":false,"has_clicked_already":false,"buttons":
  
  [{"id":3922,"name":"button3992","has_clicked":false},
  
  {"id":4613,"name":"button4613","has_clicked":false},
  
  {"id":4339,"name":"button4339","has_clicked":false},
  
  {"id":4340,"name":"button4340","has_clicked":false},
  
  {"id":4341,"name":"button4341","has_clicked":false},
      {"id":4622,"name":"button4622","has_clicked":false},
  
  {"id":4623,"name":"button4623","has_clicked":false},
  
  {"id":4828,"name":"button4828","has_clicked":false},
      {"id":4829,"name":"button4829","has_clicked":false},
  
  {"id":4861,"name":"button4861","has_clicked":false}]}
  </code></pre>
  
  <p>What I'm wanting to do is change all the value's to true without clicking on all of the buttons. I've tried doing a lot of research and spent 4 hours figuring out how I could do this and me being very new to all this just leaves me stuck... 
  I just need someone to give me a hand it would be greatly appreciated! Thankyou</p>