Which tutorial to learn from for xano bookmark with state components?

Well, the first tutorial is intended for your exact use case. Is there a problem with it?

I'm following the tutorial but changed the bookmarks data type from 'text' to 'integer' because I'm using the ${user.id} variable instead. I've made the PATCH request and it works in Xano's Run&Debug but it does not run in Bravostudio. I get the error message "Error building JSON request body" . I did not add quotation marks in this JSON because ${user.id} is an integer. When I do add quotation marks it runs but is unable to locate request.

Another issue is the first GET request in the tutorial. I followed the tutorial but used user_id instead of deviceid. I get a ParseError in Xano saying the 2nd operand must be json or an array. May it be because the bookmarks data type is "integer[]" and user_id is "integer" ?

I'm not really familiar with the tutorial and I would recommend to create a new thread since this is a (or multiple) new problem.
It should still work with text, so try not changing it to integer and keep the quotation marks