post https://{hostname}/api/v1/commons/persons/employee_tags/multi_upsert
For each set of employee tag assignments within the request body, this operation replaces existing tag assignments, or, if none exist, creates new assignments. If an assignment span is specified, only the assignments within that span are replaced. If no assignment span is specified, all assignments are replaced. If no assignments are provided, the existing assignments are removed. This operation supports partial success.