преобразовать str в dict
"{'exchange': 'MCX', 'token': 217322, 'ltp': 1367.0, 'change': 36200, 'exchange_time_stamp': 1588265459, 'volume' : 181764, 'instrument': Instrument (exchange = 'MCX', токен = 217322, символ = 'CRUDEOIL MAY FUT', name = '', expiry = datetime.date (2020, 5, 18), lot_size = None)} «