title: Changing the JSON key and keeping its index same
body: <p>I want to change the key of JSON attribute and keep/persist its position/Index.</p>
  
  <p>E.g.</p>
  
  <pre><code>{"Test1" : { 
               mytest1:34,
               mytest2:56,
               mytest6:58,
               mytest5:89,
             }
  }
  </code></pre>
  
  <p>Now I want to change the key <strong>mytest6</strong> to <strong>mytest4</strong> and keep its position as it is.</p>
  
  <p><strong>Note:</strong> In my case I can't use Array.</p>
  
  <p>Thanks.</p>