JSON Composition for sending:

{
	*"auth" : key obtained in get/auth method
	*,"status" : integer - 0/unread, 1/read, 2/all
	,"order" : text - order number
	,"invoice" : integer - invoice number
	,"begin" : date (dd/mm/yyyy) start period
	,"end" : date (dd/mm/yyyy) end period
}

Code:
200: query executed successfully
404: orders not found
407: begin tag out of standard dd/mm/yyyy
500: invalid auth