create_amendment
Create an amendment on a contract. contract_id and name are required. Optional summary/notes, dates (YYYY-MM-DD): signed_date/effective_date/new_expiration_date.
Parameters
- contract_id (string, required)
- name (string, required)
- summary (string)
- notes (string)
- signed_date (string)
- effective_date (string)
- new_expiration_date (string)