/contacts/{id}
curl -X GET "https://example.com/contacts/string"{ "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08", "email": "string", "first_name": "string", "last_name": "string", "created_at": "string", "unsubscribed": true, "object": "contact", "properties": { "property1": { "type": "string", "value": "string" }, "property2": { "type": "string", "value": "string" } }}