Appreciate providing those details. I believe I have identified the problem - You are attempting to pass an object with the key name ‘field’ or ‘raw’, based on your respective HTTP - Put screenshots.
So effectively what the Put function is attempting to do, is pass an object that looks like the following:
You will want to create a field for each field you are passing to Confluence under the ‘body’ section of the Put function. So you’ll want to add a field for version, ancestors, type, title, body, etc. Make sure to set each field that is passing an object to type object. So based on your screenshot, fields version, ancestors, and body should be set to type object. Other fields should remain string. Follow this pattern for all necessary fields.
I’m pretty confident this should resolve the issue, however, if it doesn’t let me know and we’ll continue investigating.