AWS4-HMAC-SHA256 Credential=AKIDEXAMPLE/20150830/us-east-1/service/aws4_request, SignedHeaders=host;my-header1;x-amz-content-sha256;x-amz-date, Signature=ce153a4d3cd49f14e231c0fd5c87b341f370d3843ffc58e3a92d8b7a55a668d1