Self Update Privileges via API


I am setting up a new self-managed IDM and am building out privileges in the privileges.json for users to be able to make self updates and view different data in IDM. I created a role manually to do this, but given is for all users, am building it as a privilege now. Question I have, when I add the privileges in the privileges.json, can define the privilge, but want to add to the privilegeAssignment.json and trying to find the relationshipField to allow for self update. Is there a standard ‘self’ or other way to assign to all users for their self?