> curl --data @- -X PUT --dump - http://localhost:8529/_api/simple/update-by-example
{ "collection" : "test", "example" : { "age" : 37, "likes" : "tennis" }, "newValue" : { "age" : null, "likes" : "foo" }, "keepNull" : false }

HTTP/1.1 200 Ok
content-type: application/json

{
  "code": 200,
  "updated": 1,
  "error": false
}