post https://api-stage.bill.com/api/v2/Crud/Update/CustomerContact.json
Update a customer contact object.
What is a customer contact?
When you create a customer with /Crud/Create/Customer.json, one contact is added. You can create additional customer contacts with /Crud/Create/CustomerContact.json.
Additional customer contacts are useful when the customer has multiple departments, such as purchasing, sales, and accounting. With multiple customer contacts, you can select one or more contacts for receiving invoices and other communications.