How can I add a custom property to the Contact?
[status] => error
[message] => Property values were not valid
[correlationId] => 0f92a945-df10-4739-8a54-37c2b519e3dc
[validationResults] => Array
 => Array
[message] => Property “property” does not exist
[error] => PROPERTY_DOESNT_EXIST
[name] => property
) [requestId] => 256dd0f4a82eaa7d3413bc5862811281
This is the response I get when I tried to create a new contact with “property” as custom property.