zeromq

Property Name	Type	Required
command	string	Yes
mechanism	string	Yes
signature	string	Yes
socket_type	string	Yes
zmtp_version	string	Yes

{
    "signature": "OK (0xFF)",
    "zmtp_version": "3.0",
    "mechanism": "NULL",
    "command": "READY",
    "socket_type": "ROUTER"
}