shell> curl -X PATCH --data-binary @- --dump - http://localhost:8529/_api/gharial/social/vertex/female/alice
{ 
  "age" : 26 
}

HTTP/1.1 202 Accepted
content-type: application/json
etag: 1539270102

{ 
  "error" : false, 
  "code" : 202, 
  "vertex" : { 
    "_id" : "female/alice", 
    "_rev" : "1539270102", 
    "_oldRev" : "1536779734", 
    "_key" : "alice" 
  } 
}