shell> curl -X PUT --data-binary @- --dump - http://localhost:8529/_api/collection/products1/rename
{ 
  "name" : "newname" 
}

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

{ 
  "id" : "1391322743", 
  "name" : "newname", 
  "isSystem" : false, 
  "status" : 3, 
  "type" : 2, 
  "error" : false, 
  "code" : 200 
}