> curl --data @- -X PUT --dump - http://localhost:8529/_api/blueprints/edge/edge1?graph=graph1
{"optional2" : "val2"}

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

{
  "edge": {
    "_id": "82564582/85317094",
    "_rev": 85906918,
    "_key": "85317094",
    "_bidirectional": false,
    "_from": "81778150/84989414",
    "_to": "81778150/84792806",
    "$label": null,
    "$id": "edge1",
    "optional2": "val2"
  },
  "error": false,
  "code": 200
}