POST / 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=3044022020e04d83be1fc4c7669eb2530c48444ff2ef65e73ab6d4084ba89b886b70d01a0220570df05bd3ba39ccd96a3e831ed8757fbb516baa603d78eaed3ccc95d50a2abb

