How to iterate ADP variable and pass the field values to a variable based on REST end point POST met

Summary

How to iterate ADP variable and pass the field values to a variable based on REST end point POST method

Content

I have and editable table based on ADP variable where entries can be made. Once everything is entered I need to pass some fields to a REST end point for creating the order. The structure of ADP and REST Json is not same. Not all fields from ADP needs to be mapped to REST, some fields come from other parts of the page(Header level). REST based variable had header and line level attributes. the line level is repeating and that should be populated with as many rows  as we have filled in the table on the screen.