I have added 2 custom fields to the External Contacts. I am now trying to populate these fields using the API, however, I keep getting a bad request error. I have tried from both the API Explorer and the direct API call but get the same error. Here is the body of the request:
You must include a reference to the External Contact schema (id and version) that you are leveraging for your External Contact custom fields - i.e. the schema of your "Custom Contact Type".
You can access the list of schemas (id and version) using GET /api/v2/externalcontacts/contacts/schemas.
When referencing the schema in the request to create an external contact, make sure to reference the schema AND the schema current version (1, 2, ...).