Unable to parse data from a variable

[rupanivenky (venky rupani)]

Hi @danny-dainton @gbadebo-bello

What is the object name I am supposed to provide there, based on previous thread, I am creating the json file with expected key and values.

Please refer this: CSV comparison to a responseBody - Help - Postman Community

Here is my full JSON data file info:

Here is the testcase to retrieve the response and validate against json file testData:

Here is how, I am trying to get testData.json while Run collection:

Please assist on how to proceed further with the requirement I have to validate set of responses against the JSON file data. Thank you.