{
  "definitions": {
    "user": {
      "properties": {
        "id": {
          "type": "string"
        },
        "name": {
          "type": "string"
        }
      }
    }
  },
  "properties": {
    "messageId": {
      "type": "string"
    },
    "timestamp": {
      "type": "timestamp"
    },
    "details": {
      "discriminator": {
        "tag": "type",
        "mapping": {
          "user_created": {
            "properties": {
              "user": {
                "ref": "user"
              }
            }
          },
          "user_deleted": {
            "properties": {
              "userId": {
                "type": "string"
              }
            }
          }
        }
      }
    }
  }
}