POST /?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIDEXAMPLE%2F20150830%2Fus-east-1%2Fservice%2Faws4_request&X-Amz-Date=20150830T123600Z&X-Amz-SignedHeaders=content-length%3Bcontent-type%3Bhost&X-Amz-Expires=3600&X-Amz-Signature=89a40deed0f26f9461242825a082d2222717248abc7ab41f552ad84a94ad46e9 HTTP/1.1
Content-Type:application/x-www-form-urlencoded
Host:example.amazonaws.com
Content-Length:13

Param1=value1