curl -i -X POST 'http://localhost:8000/projects/{project_id}/virtualbox/vms/{vm_id}/start' -d '{}'

POST /projects/{project_id}/virtualbox/vms/{vm_id}/start HTTP/1.1
{}


HTTP/1.1 204
CONNECTION: keep-alive
CONTENT-LENGTH: 0
DATE: Thu, 08 Jan 2015 16:09:15 GMT
SERVER: Python/3.4 GNS3/1.3.dev1
X-ROUTE: /v1/projects/{project_id}/virtualbox/vms/{vm_id}/start