ScalaJsonUtils.scala

  def tagJson(tag: String, json: JValue): String = {
    val jsonMap = json.asInstanceOf[JObject].values
    val hmm = jsonMap.collect {
      case (key: String, value) => (tag + "." + key, value)
    }
    implicit val formats = net.liftweb.json.DefaultFormats
    compact(JsonAST.render(decompose(hmm)))
  }