GET /./ HTTP/1.1
Host:example.amazonaws.com
X-Amz-Date:20150830T123600Z
X-Amz-Region-Set:us-east-1
Authorization:AWS4-ECDSA-P256-SHA256 Credential=AKIDEXAMPLE/20150830/service/aws4_request, SignedHeaders=host;x-amz-date;x-amz-region-set, Signature=3044022049aaa02168ac9666a94f42238be0a02a7a244b74d6e16bdf64aac7ce8e21e44d02206b9be50186bdd4ee9191c0dd5ccff7e990365bb3b56430653f6fa49a68dbf596

