GET / HTTP/1.1
Host:example.amazonaws.com
My-Header1:value1
  value2
     value3
X-Amz-Date:20150830T123600Z
Authorization: AWS4-HMAC-SHA256 Credential=AKIDEXAMPLE/20150830/us-east-1/service/aws4_request, SignedHeaders=host;my-header1;x-amz-date, Signature=ba17b383a53190154eb5fa66a1b836cc297cc0a3d70a5d00705980573d8ff790