curl -i -X POST 'http://localhost:8000/vpcs/{uuid}/ports/{port_id:\d+}/nio' -d '{"lport": 4242, "rhost": "127.0.0.1", "rport": 4343, "type": "nio_udp"}'

POST /vpcs/{uuid}/ports/{port_id:\d+}/nio HTTP/1.1
{
    "lport": 4242,
    "rhost": "127.0.0.1",
    "rport": 4343,
    "type": "nio_udp"
}


HTTP/1.1 201
CONNECTION: keep-alive
CONTENT-LENGTH: 89
CONTENT-TYPE: application/json
DATE: Thu, 08 Jan 2015 16:09:15 GMT
SERVER: Python/3.4 GNS3/1.3.dev1
X-ROUTE: /vpcs/{uuid}/ports/{port_id:\d+}/nio

{
    "lport": 4242,
    "rhost": "127.0.0.1",
    "rport": 4343,
    "type": "nio_udp"
}