// save with create new not support update yet
 public saveEntityTimeseries(entityId: EntityId, timeseriesScope: string, timeseries: Array<AttributeData>,
                              config?: RequestConfig): Observable<any> {
    const timeseriesData: {[key: string]: any} = {};
    const deleteTimeseries: AttributeData[] = [];
    timeseries.forEach((attribute) => {
      if (isDefinedAndNotNull(attribute.value)) {
        timeseriesData[attribute.key] = attribute.value;
      } else {
        deleteTimeseries.push(attribute);
      }
    });
    let deleteEntityTimeseriesObservable: Observable<any>;
    if (deleteTimeseries.length) {
      deleteEntityTimeseriesObservable = this.deleteEntityTimeseries(entityId, deleteTimeseries, true,
        null, null, false, true, config);
    } else {
      deleteEntityTimeseriesObservable = of(null);
    }
    let saveEntityTimeseriesObservable: Observable<any>;
    if (Object.keys(timeseriesData).length) {
      saveEntityTimeseriesObservable =
        this.http.post(`/api/plugins/telemetry/${entityId.entityType}/${entityId.id}/timeseries/${timeseriesScope}`,
        timeseriesData, defaultHttpOptionsFromConfig(config));
    } else {
      saveEntityTimeseriesObservable = of(null);
    }
    return forkJoin([saveEntityTimeseriesObservable, deleteEntityTimeseriesObservable]);
  }