curl -u admin:admin -X POST http://localhost:9000/api/subscribers -H 'Content-Type: application/json' -d '{"email":"john@example.com","name":"John Doe","status":"enabled"}'

Adds a subscriber with the given email and name; email and name are required, status defaults to enabled. Pass lists as an array of list ids to subscribe them immediately. Duplicate emails are rejected, so check for an existing record first or expect a 422 response.