Required walmartjson.txt file

Ok, visit this link below. Its almost similar but not the exact JSON.
https://drive.google.com/file/d/1idGe0oycdcAiFrLNnTzV4KuNrLNk-MdK/view?usp=sharing

I'll also suggest you to google some other json and try build your own logic for extracting out of that different json for better understanding.