POST - https://subscribercrmapi-dev.galapagosconservation.org.uk/api/holdingpersonaldetails
Updates an existing contact's Personal Details.
{ "ContactId": 5678, "GenderId": -1, "EthnicityId": -1, "Title": "Mr", "FirstName": "Bruce", "Surname": "Wayne", "Position": "", "Department": "", "Organisation": ""}