From HEXONET Wiki
This command allows you to sync details of a contact from the registry back to the HEXONET system. It is only possible to do this with contacts owned by your account.
COMMAND
(required) command = SyncContact contact = (CONTACT) domain = (DOMAIN)
IMPORTANT: Please have a look at the Domain API-Manual for a current list of allowed parameters.
RESPONSE
(required) code = (CODE) description = (DESCRIPTION)