public async Task <List <TradingInstrumentContract> > List([FromQuery] string tradingConditionId)
        {
            var data = string.IsNullOrWhiteSpace(tradingConditionId)
                ? await _tradingInstrumentsRepository.GetAsync()
                : await _tradingInstrumentsRepository.GetByTradingConditionAsync(tradingConditionId);

            return(data.Select(x => _convertService.Convert <ITradingInstrument, TradingInstrumentContract>(x)).ToList());
        }