arangodb/Documentation/Examples/rest-update-document-if-match-other-last-write

> curl --data @- -X PUT '-H if-match: "30246701"' --dump - http://localhost:8529/_api/document/73482/30246702?policy=last
{ "World" : "Hello" }

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

{
  "_rev": "30312238",
  "_id": "73482/30246702",
  "error": false
}