Hey LennSar
As always i'm a bit lost on what you want (the problem is me, not you!), but
if i understand correctly, as ChrisAdams said you can use the DataSink to write out responses.....do you want the responses? The way i read your post, it seemed like you wanted the input payloads for later comparison?
Then i changed my mind after re-reading and then thought you wanted to confirm the sequential PUTs updated the endpoints database correctly. If you want to verify a CRUD transaction, i always follow up with a GET to retrieve the updated detail to assert the changes were made successfully and if there isn't a GET method available i use a JDBC step to do the same.
Still unsure what youre after or if any of my comments are relevant!😉
Cheers!
Rich