POST
/

content-length:13
host:example.amazonaws.com
x-amz-content-sha256:UNSIGNED-PAYLOAD
x-amz-date:20150830T123600Z
x-amz-region-set:us-east-1

content-length;host;x-amz-content-sha256;x-amz-date;x-amz-region-set
UNSIGNED-PAYLOAD