Staked (address staker, uint256 sessionId, uint256 optionId, uint256 amount)
[topic 0]:0xb4caaf29adda3eefee3ad552a8e85058589bf834c7466cae4ee58787f70589ed
[topic 2]:0x0000000000000000000000000000000000000000000000000000000000000001
[topic 3]:0x0000000000000000000000000000000000000000000000000000000000000001
0x0000000000000000000000000000000000000000000000000de0b6b3a7640000