"ioConfig": {
      "type": "index_parallel",
      "inputSource": {
        "type": "s3",
        "uris": null,
        "prefixes": [
          "s3://example-bucket/bm/druid/default.example/part-"
        ],
        "objects": null,
        "properties": {
          "accessKeyId": "XXX",
          "secretAccessKey": "XXX",
          "assumeRoleArn": null,
          "assumeRoleExternalId": null
        }
      },
      "inputFormat": {
        "type": "parquet",
        "flattenSpec": {
          "useFieldDiscovery": true,
          "fields": []
        },
        "binaryAsString": false
      },
      "appendToExisting": false,
      "dropExisting": false
    },