arangodb/Documentation/Examples/rest-update-document

> curl --data @- -X PUT --dump - http://localhost:8529/_api/document/73482/29853486
{ "World" : "Hello" }

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

{
  "_rev": "29919022",
  "_id": "73482/29853486",
  "error": false
}