{

"$schema": "http://json-schema.org/draft-07/schema",
"definitions": {
  "timestamp": {
    "type": "string"
  },
  "group_history_changed": {
    "type": "object",
    "description": "learn more: https://api.slack.com/events/group_history_changed",
    "properties": {
      "event_ts": {
        "$ref": "#/definitions/timestamp"
      },
      "latest": {
        "$ref": "#/definitions/timestamp"
      },
      "ts": {
        "$ref": "#/definitions/timestamp"
      },
      "type": {
        "const": "group_history_changed"
      }
    },
    "example": {
      "event_ts": "1361482916.000004",
      "latest": "1358877455.000010",
      "ts": "1361482916.000003",
      "type": "group_history_changed"
    }
  }
}

}