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

curl -i -X POST 'http://localhost:3080/v2/projects/f7b4e81b-00cf-4e92-a783-f7a9ad71d225/snapshots' -d '{"name": "snap1"}'

POST /v2/projects/f7b4e81b-00cf-4e92-a783-f7a9ad71d225/snapshots HTTP/1.1
{
    "name": "snap1"
}


HTTP/1.1 201
Connection: close
Content-Length: 170
Content-Type: application/json
Date: Thu, 29 Jun 2017 15:08:09 GMT
Server: Python/3.6 GNS3/2.1.0dev1
X-Route: /v2/projects/{project_id}/snapshots

{
    "created_at": 1498748890,
    "name": "snap1",
    "project_id": "f7b4e81b-00cf-4e92-a783-f7a9ad71d225",
    "snapshot_id": "f87df065-9340-4421-b67d-f1ecd81258b4"
}