Hey Michael,
Thanks for your quick response.
What i want to achieve is not to put the dynamic values like "Name" : "Postman" .... etc. instead i am trying to copy the Name from my servicenow table. i am attaching one screenshot, plz check it, it will give you a clear picture.
Here if you see, the Short Description is copied exactly the same to the Rally Defects Description Field. But when you see the Name in Rally its some random alphanumeric values, its not the value as there in servicenow caller field.