Add a note to the contact named in the path. This is the contact equivalent of Create a deal note, and the v3 equivalent of the v1 contact_note_add action.

The contact in the path owns the note, so the body never carries the polymorphic relid/reltype (or owner/ownerType) pair that Create a note requires: any owner sent in the body is ignored and the path wins.

Requires permission to edit contacts.