POST - https://subscribercrmapi.galapagosconservation.org.uk/api/payment
Adds a Payment for an existing subscription demand or a donation.
{ "Id": null, "ContactId": 1234, "DemandId": 567, "DonationId": null, "Amount": 50.0, "TransactionDate": "2024-12-23T00:00:00+00:00", "Comments": "ABC123", "PaymentMethodId": 1}