6fceee4de303e40f34809c8571ee87298821178f0e9662f40853b3da6a36?x amz algorithm=aws4 hmac sha256&x amz credential=akiaii6jt62oqlhbx2eq%2f20180619%2fap northeast 1%2fs3%2faws4 request&x amz date=20180619t202124z&x amz expires=900&x amz signedheaders=host&x amz signature=b0ebdb9a2058377fe0dd5b4930f8aaeb2787027a6816d43cdaf8efe7efda9a85