ERC20Withdraw (index_topic_1address rootToken, index_topic_2address childToken, address withdrawer, index_topic_4address receiver, uint256 amount)
[topic 0]:0x9c4f744b2e971d7058a9d8f43977e0e17bf7d57a48659f0e18541b7ee3d022e4
0x0000000000000000000000000b873e47b20a628e8284b52ff2e51050c10949d80000000000000000000000000000000000000000000000000de0b6b3a7640000