Hi Aashima,
You can do a number of things depending on your desired output.
If you want to call certain nested collections you can just the dot notation e.g. [results.id.iteminfo]
If you are able to pre-define all potential fields in these collection so that when populated they can be half filled decision stages that check whether a field is empty will help you in your process.
Best Regards
------------------------------
Ronan Considine
------------------------------
Ronan Considine
Senior Business Analyst
Blue Prism