POST
/

content-length:13
content-type:application/x-www-form-urlencoded; charset=utf-8
host:example.amazonaws.com
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
x-amz-date:20150830T123600Z
x-amz-region-set:us-east-1

content-length;content-type;host;x-amz-content-sha256;x-amz-date;x-amz-region-set
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855