get deprecated
https://{region}-api.dotdigital.com/v2/contacts//transactional-data/
Gets a list of up to 100 pieces of transactional data records for a contact in a collection by their email address, sorted by the transactional record key.
This operation retrieves a list of transactional data pieces for a contact by a collection name. However, it can only return a maximum of the 100 pieces of transactional data stored against that contact — sorted by the key of the transactional document.