POST / host:example.amazonaws.com my-header1:VALUE1 x-amz-date:20150830T123600Z x-amz-region-set:us-east-1 host;my-header1;x-amz-date;x-amz-region-set e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855