Buy (index_topic_1address account, uint256 assetAmount, uint256 payoutAmount, uint256 duration)
[topic 0]:0xbeae048c6d270d9469f86cf6e8fedda3c60ad770f16c24c9fc131c8e9a09101d
0x0000000000000000000000001bdc4bab22e6b49393bd5874e49f7e3386ea6af10000000000000000000000000000000000000000000000000000000000001b5800000000000000000000000000000000000000000000000000f8b0a10e47000000000000000000000000000000000000000000000000001a901db3de65680000