ExchangeTracking (bytes32 trackingCode, bytes32 toCurrencyKey, uint256 toAmount, uint256 fee)
[topic 0]:0x598db110c31345e2c4418fa8a5d4e125f3526f24b214150e19d76e5889ed120b
[topic 1]:0x53594e5448520000000000000000000000000000000000000000000000000000
0x735553440000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001b87bcf1dbb9bef6400000000000000000000000000000000000000000000000000000000000000000