implicit converter lets you read Json into Option[Double] Scala Data Type

JsonReadOptionDoubleJson

object DoubleReads {
  def reads(json: JsValue): JsResult[Option[Double]] = json match {
    case JsNumber(n) => JsSuccess(Some(n.toDouble))
    case JsString(s) => JsSuccess(Some(s.toDouble))
    case _ => JsSuccess(None)
  }
}

// Later in your code where you need
implicit val odr: json.Reads[Option[Double]] = DoubleReads.reads
// then you can
val data = Json.fromJson[ObjContainingOptionDouble](json)