// Это в компоненте:

  subscribe(companyId: number) {
    this.store.dispatch(new CompaniesActions.SubscribeCarrier(companyId));
  }

Action:

export class SubscribeCarrier implements Action {
    readonly type = Actions.SUBSCRIBE_CARRIER;

    constructor(public readonly carrierId: number) {
    }
}

// Это в эффекте:

  @Effect()
  subscribeCompany$ = this.actions$.pipe(
    ofType(CompaniesActions.Actions.SUBSCRIBE_CARRIER),
    switchMap(({carrierId}) =>
      this.companiesService.subscribeCarrier(carrierId).pipe(
        switchMap((company) => {
          this.notificationService.notify('Вы успешно подписались');
          return [new CompaniesSideActions.SubscribeCarrierSuccess(company)];
        }
        ),
        catchError((err) => [new CompaniesSideActions.SubscribeCarrierError(err)])
      )
    )
  );

// SideActions:

export class SubscribeCarrierSuccess implements Action {
    readonly type = Actions.SubscribeCarrierSuccess;

    constructor(public company: any) {
    }
}