From HEXONET Wiki
The AddNameserver command creates a Nameserver host in the registry.
COMMAND
(required) command = AddNameserver nameserver = (NAMESERVER) ipaddress0 = (IPADDRESS) ipaddress1 = (IPADDRESS) (optional) ipaddress2 = (IPADDRESS) ipaddress3 = (IPADDRESS) ipaddress4 = (IPADDRESS) ... ipaddress12 = (IPADDRESS)
IMPORTANT: Please have a look at the Domain API-Manual for a current list of allowed parameters.
RESPONSE
(required) code = (CODE) description = (DESCRIPTION)