Create campaign in Active Campaign with http block

Hi, has everyone succeeded in programming a campaign in Active campaign through the http block ?

I would like to start with rows from Airtable (this part’s ok, it’s easy) and then use the data I’d retrieve to set up my campaigns in Active Campaign.

I know you have to use this endpoint :

But god is it hard to understand, and anytime I look for answers, I find different ones. Some video says I need to setup a create_json first, no actually it’s an aggregator, no it’s a data structure…
not to mention that the http block in itself, is really hard to grasp (and tutorials show only the most basic of example).
I’m completely lost.

If anybody ever succeeded and had the time to put me on the right track, it’d be amazing,

Thanks in advance,