ExchangeRatesUpdated (uint256 timestamp, uint256 dataInUsd)
[topic 0]:0xc84d758f9836fe65b8f2be13d5e364b9373411e1158b63c1c5abbbae78949609
0x000000000000000000000000000000000000000000000000000000006774858a0000000000000000000000000000000000000000000000011bacf8e7e819d4c8