unix> curl -X PUT --data @- --dump - http://localhost:8529/_api/document/products4/27472474
{}

HTTP/1.1 202 Accepted
content-type: application/json; charset=utf-8
etag: "28062298"
location: /_api/document/products4/27472474

{ 
  "error" : false, 
  "_id" : "products4/27472474", 
  "_rev" : "28062298", 
  "_key" : "27472474" 
}