curl -i -X POST 'http://localhost:3080/v2/settings' -d '{"test": true}'

POST /v2/settings HTTP/1.1
{
    "test": true
}


HTTP/1.1 201
Connection: close
Content-Length: 85
Content-Type: application/json
Date: Mon, 08 Jan 2018 08:16:40 GMT
Server: Python/3.6 GNS3/2.1.2dev1
X-Route: /v2/settings

{
    "modification_uuid": "c1aaa5d1-ce63-49f4-bfcc-e67dfac60ce3",
    "test": true
}