Create or update a contact

Create or update a contact

Request Body — REQUIRED
contactId string Omit to create-or-update by identifier; pass an existing contact id to update.
predefinedFields object Predefined fields keyed by name: FirstName, LastName, Email, Phone.
customFields object Custom fields keyed by field NAME.
tagsAdded string[] Tag NAMES to add (must already exist; unknown name -> 400).
tagsRemoved string[] Tag NAMES to remove (unknown name -> no-op).

Responses
200 OK Schema — OPTIONAL object