PUT), or only a subset of them (via PATCH).
Example
For example, to indicate that a specific Employee is a freelancer, you can submit aPATCH
request to the employees/<ID>/custom_properties/ endpoint:
PUT for this request, all the attributes that are not in the
request body are automatically deleted.
All custom properties of an Employee can be retrieved via submitting a GET
request the employees/<ID>/custom_properties/ endpoint.