CooldownChanged (uint256 oldCooldown, uint256 newCooldown)
[topic 0]:0x0731af75921ee6c66096a5c95daa1adcf95ff01e0ce8063a2369cb218ee4bcc9
0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002a300