in app/controllers/Api.scala [44:51]
def sortString(jsv: JsValue): String =
jsv match {
case JsString(str) => str
case JsArray(seq) => seq.map(sortString).mkString
case JsObject(fields) =>
fields.map { case (key, value) => s"$key${sortString(value)}" }.mkString
case _ => ""
}