H @astrava,
I’d suggest making the full request, passing all the params [as logged in /opt/kaltura/log/insertContent.log] using curl CLI from the shell and checking the /opt/kaltura/log/kaltura_api_v3.log.
As a general note, when posting such requests, be sure to mask sensitive info such as KS strings and other secrets.
I see you masked the endpoint/service URL and obviously this is not yet a production ENV but still:)