RetentionRatioUpdated (uint256 previousRetentionRatio, uint256 newRetentionRatio)
[topic 0]:0xbc341359e3658046c114365fc4bf0a6bfe11e53d72faf8ac4fe19b53aec6b3f9
0x0000000000000000000000000000000000000000000000000de0b6b3a764000000000000000000000000000000000000000000000000000006f05b59d3b20000