The request is for GET/POST/PATCH/DELETE of notes on actions.

This is the only data on the action entity that is in the user interface but not available on the action entity. 

Further, since one note is already exposed via the description field, but that note can change depending on last modified date (? unclear what the rules governing this are), the current functionality makes data loss a very real possiblity. Consider:

1) API creates an action with a description, which gets stored as a note

2) User creates a new note through the NXT UI

3) API edits the description of the action

At this point, it is very possible the PATCH in #3 will overwrite the note created in #2 and that note will be lost.