REST API:Record Updates
From AgileApps Support Wiki
- For PUT requests (updates):
- The target object/record is specified in the URI.
- An object or record ID specified in the request is ignored.
- Fields are specified in the request.
- Most fields are optional. (Those that are required are specified in the documentation page for that resource, under Fields.)
- If a field is missing, existing data in that field is unaffected.
- If a field is specified, but empty, any existing data in that field is deleted.