curl -i -X PUT 'http://localhost:8000/projects/{project_id}' -d '{"temporary": false}'

PUT /projects/{project_id} HTTP/1.1
{
    "temporary": false
}


HTTP/1.1 200
CONNECTION: keep-alive
CONTENT-LENGTH: 164
CONTENT-TYPE: application/json
DATE: Thu, 08 Jan 2015 16:09:15 GMT
SERVER: Python/3.4 GNS3/1.3.dev1
X-ROUTE: /v1/projects/{project_id}

{
    "location": "/var/folders/3s/r2wbv07n7wg4vrsn874lmxxh0000gn/T/tmptf8_s67s",
    "project_id": "12d03846-c355-4da9-b708-cd45e5d30a50",
    "temporary": false
}