I need to set the content of a block editor campaign. After having a look in the DB, it seems like the json_body column stores the block editor content.

I have seen a text_body property to fill when using the REST API for a text campaign.
I have seen a html_boy property to fill when using the REST API for a markdown campaign.
But I can't use (and find) neither json_body nor block_body to use on the REST API.

Is there maybe another way to set the content of a block campaign?

Cheers