gns3-server/docs/api/examples/controller_post_version.txt

curl -i -X POST 'http://localhost:3080/v2/version' -d '{"version": "2.0.0dev4"}'

POST /v2/version HTTP/1.1
{
    "version": "2.0.0dev4"
}


HTTP/1.1 200
Content-Length: 30
Content-Type: application/json
Date: Thu, 03 Nov 2016 17:20:05 GMT
Server: Python/3.5 GNS3/2.0.0dev4
X-Route: /v2/version

{
    "version": "2.0.0dev4"
}