> curl --data @- -X PUT --dump - http://localhost:8529/_api/blueprints/vertex/v1?graph=graph1
{"optional1" : "val2"}

HTTP/1.1 200 OK
content-type: application/json; charset=utf-8

{
  "vertex": {
    "_id": "39572966/42653158",
    "_rev": 42849766,
    "_key": "42653158",
    "$id": "v1",
    "optional1": "val2"
  },
  "error": false,
  "code": 200
}