BlogModels.scala

...
import scalaz.\/

object Models {
  case class SuccessResponse(payload: JsValue)
  case class ErrorResponse(message: Message)
  
  // it's up to you to define subscription model
  case class SubscriptionMessage(userId: String)
  case class ThrowableOrSubscriptionsMessage(disjunction: \/[Exception, SubscriptionMessage])
  case class NotificationEvent(eventSubscription: SubscriptionMessage, payload: JsValue)
  
  case class RedisPublishMessage(channel: String, message: String)
  case class RedisSubscribeMessage(channel: Seq[String])
  case class RedisUnsubscribeMessage(channel: Seq[String])
  
  ...
}