How to format json response body in soap UI

I am getting json body from rest response with escaped cahrs as shown below. How to format josn response in soapUI using groovy script?

 

        {
          "employee": "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}"
     }

       

Expected Output:            

      {

                     "employee":

                           {

                              "name": "John",

                              "age": 30,

                              "city": "New York"

                          }

                }