{
  "defaultSigner": {
    "signerType": "DefaultSignerType"
  },
  "serviceSigners": [{
    "key": "s3",
    "config": {
      "signerType": "S3SignerType"
    }
  }],
  "regionSigners": [],
  "serviceRegionSigners": [{
    "key": "s3/us-east-1",
    "config": {
      "signerType": "S3SignerType"
    }
  }, {
    "key": "s3/us-west-1",
    "config": {
      "signerType": "S3SignerType"
    }
  }, {
    "key": "s3/us-west-2",
    "config": {
      "signerType": "S3SignerType"
    }
  }]
}