Akka http (de)serializer for Map[String, Any]

akka-(de)serializer.scala

  implicit object AnyJsonFormat extends JsonFormat[Any] {
    def write(x: Any) = x match {
      case n: Int                       => JsNumber(n)
      case s: String                    => JsString(s)
      case x: Seq[_]                    => seqFormat[Any].write(x)
      case m: Map[String, _] @unchecked => mapFormat[String, Any].write(m)
      case b: Boolean if b              => JsTrue
      case b: Boolean if !b             => JsFalse
      case x =>
        serializationError(
          "Can't serialize object of type " + x.getClass.getName
        )
    }

    def read(value: JsValue): Any = value match {
      case JsNumber(n) => n.intValue()
      case JsString(s) => s
      case _: JsArray  => listFormat[Any].read(value)
      case _: JsObject => mapFormat[String, Any].read(value)
      case JsTrue      => true
      case JsFalse     => false
      case x =>
        deserializationError("Can't deserialize " + x)
    }
  }