curl -i -X POST 'http://localhost:3080/v2/compute/projects/a1e920ca-338a-4e9f-b363-aa607b09dd80/nat/nodes/60c8420d-7c38-4628-859d-85e406dfb436/adapters/0/ports/0/nio' -d '{"lport": 4242, "rhost": "127.0.0.1", "rport": 4343, "type": "nio_udp"}'

POST /v2/compute/projects/a1e920ca-338a-4e9f-b363-aa607b09dd80/nat/nodes/60c8420d-7c38-4628-859d-85e406dfb436/adapters/0/ports/0/nio HTTP/1.1
{
    "lport": 4242,
    "rhost": "127.0.0.1",
    "rport": 4343,
    "type": "nio_udp"
}


HTTP/1.1 201
Content-Length: 89
Content-Type: application/json
Date: Tue, 27 Sep 2016 10:01:07 GMT
Server: Python/3.5 GNS3/2.0.0dev1
X-Route: /v2/compute/projects/{project_id}/nat/nodes/{node_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio

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