title: Mule- Dataweave to insert new json field in the existing payload
body: <p>Sample Json Request</p>
  
  <p>{
      "firstName": "George",
      "lastName": "Stephen"
  }</p>
  
  <p>Sample Json Response</p>
  
  <p>{
     "id": "123",
     "firstName" : "George",
     "lastName" : "Stephen"
  }</p>
  
  <p>I want to do insert id value into Response Json without doing one to one mapping in dataweave ( I already have the working solution which does one to one mapping in dataweave and 2) using groovy component). </p>
  
  <p>My Original JSON  Request is huge and lots of non-mandatory field that's why i am experimenting this way.</p>