Getting help turning bundles or data into a json object?

Hey all, hopefully someone can help me with this. I have been researching and I learned a lot, I just seem to be missing a few steps here.

In this case, I am pulling in all the contacts that I have in a list from Brevo which is a CRM and I want to send it to Relevance AI.

Relevance AI wants to receive this as a JSON object, but I just keep getting tripped up. I don’t know why. I tried the JSON aggregator, but that seems to create a JSON string, not an object.

If someone can kindly provide the steps on how to take these bundles and turn them into one JSON object, I would super appreciate it. Thank you.