Hi Community Experts,
I have one situation with the PurchaseOrderLinesV2 Data entity,
I have added some custom fields with "Is Computable Field" property set to "No.
And some methods in the entity through extension and I am calling those methods inside the "onPostingLoad" event handler of that data entity.

This event handler is getting triggered fine and returning data in fields correctly when I am calling it through browser with this URL.
https://xxxxxxxxxxxxxxxxxxxxxxxxx.axcloud.dynamics.com/data/PurchaseOrderLinesV2
But when I call the same data entity from postman its not showing any data in the fields.

"OnPostingLoad" is getting called when I am calling the entity from postman, but it is not returning data as it returns in browser.
Where should I put my code to get data in my custom fields?
Usual helpful responses are expected :)
Best Regards.