STAKED (index_topic_1address user, uint256 amount, uint256 at)
[topic 0]:0x99b6f4b247a06a3dbcda8d2244b818e254005608c2455221a00383939a119e7c
[topic 2]:0x0000000000000000000000000000000000000000000000000000000000000000
0x00000000000000000000000000000000000000000000000821ab0d4414980000