If I found the correct API reference that you are inquiring about, I would guess that you simply need to use the Group by N snap to accumulate an array of your input objects, then complete the object to be sent with a Mapper to add in the final fields with the array - all of which is sent to the REST Post.
Here is a sample pipeline that configures the object based on their documentation:
Community 13307 - Campaign Monitor Bulk Subscribers_2022_09_02.slp (6.1 KB)
Hi Kory,
thank you very much for your response.
I will look into the solution you have given and let you know how I went.
Thank you again
Pete
