Druid meetup supervisor spec

curl --request POST \
  --url http://localhost:8090/druid/indexer/v1/supervisor \
  --header 'content-type: application/json' \
  --data '{
  "type": "kafka",
  "dataSchema": {
    "dataSource": "meetup-kafka",
    "parser": {
      "type": "string",
      "parseSpec": {
        "format": "json",
        "flattenSpec": {
          "useFieldDiscovery": true,
          "fields": [
            {
              "type": "root",
              "name": "response"
            },
            "rsvp_id",
            {
              "type": "jq",
              "name": "event_name",
              "expr": ".event.event_name"
            },
            {
              "type": "jq",
              "name": "venue_name",
              "expr": ".venue.venue_name"
            }
          ]
        },
        "timestampSpec": {
          "column": "mtime",
          "format": "auto"
        },
        "dimensionsSpec": {
          "dimensions": [
            "response",
            {
              "name": "guests",
              "type": "long"
            },
            "event_name",
            "venue_name"
          ]
        }
      }
    },
    "metricsSpec": [
      {
        "type": "count",
        "name": "count"
      },
      {
        "type": "longSum",
        "name": "guestsSum",
        "fieldName": "guests"
      }
    ],
    "granularitySpec": {
      "type": "uniform",
      "segmentGranularity": "DAY",
      "queryGranularity": "NONE",
      "rollup": false
    }
  },
  "tuningConfig": {
    "type": "kafka",
    "maxRowsPerSegment": 500000
  },
  "ioConfig": {
    "topic": "meetup",
    "consumerProperties": {
      "bootstrap.servers": "localhost:9092"
    },
    "taskDuration": "PT5M",
    "useEarliestOffset": "true"
  }
}'