POST / content-length:13 content-type:application/x-www-form-urlencoded 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