How to loop through Airtable items to add to a "create json" module as a table

Hi, I’m working with the HTTP module to create an eSignatures contract. Their api shows that it’s possible to create a table (an advanced placeholder field) inside the contract but I’m having problems with how to set this up in Make.

The table I want to have is a loop of selected linked records from an Airtable base. Using the create json module, I was able to generate the json fields for simple one-off placeholders using the eSignature’s api sample, but the table isn’t looping through the Airtable items.

But this is where I lose understanding of how to build this out.

Their table sample is:

This is my setup so far:

What I created in the Create Json module:


//

The data I’m collecting:

This is the output (that still somehow shows only in the payload not on the actual contract)

Can anyone shed some light on how to set up the json module?