How to capture rest api response in PCS data objects

Summary:

We are able to capture REST API response in PCS data objects for one record.

For example, a string variable to capture body.items[1].assignments[1].managerId

I haven't find an option to capture multiple records in one data object. I cloud see we can create data object with business data type which is usually rest api response type. But in the output data association mapping not sure how we can capture the data.

Content (required):

We have requirement where rest api returns multiple records with list of approvers Ex: abc@test.com and xyz@test.com etc

Can we form a string like abc@test.com,xyz@test.com and assign it to string variable and as approvers for human task ? Please advise.