title: Json handling in ROBOT
body: <p>I have a Json file in which there is a field which I need to edit and save the file for next usage.</p>
  
  <p>But the field which I need to edit is as shown below,</p>
  
  <p>The value I need to assign fr the field is generated Randomly in run time which i'll be capturing in a variable and pass it to this json specific key "dp" then save the json.</p>
  
  <p>The saved json will be used for REST POST url.</p>
  
  <pre><code>            {
                  "p": "10",
                  "v": 100,
                  "vt": [
                      {
                          "dp": "Field to be edited"(integer value) , 
                    ]          
              }
  </code></pre>