ChallengeJoined (uint256 challengeId, uint256 amount, address by, address token, uint256 inputStakedQty)
[topic 0]:0xf6d42021a4549bed2c5e686f3a0e138917db52e05ad24e28d9239f7caef635ca
0x00000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000989680000000000000000000000000bc4b2f820d4ce93a3f7ebdefb782d6ee48719a09000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec700000000000000000000000000000000000000000000000000000000009c6710