WithdrawAsset (index_topic_1address sponsor, address asset, index_topic_3address onBehalfOf, uint256 amount, uint256 timestamp)
[topic 0]:0x31c6c2b083b6c6fb9c8345de5c29efda3ef312a42d1bc0d4a3029465080809c1
0x000000000000000000000000491d755a33f6eb77a890925414dd5daea42e3d7c0000000000000000000000000000000000000000000000001bc16d674ec80000000000000000000000000000000000000000000000000000000000006746e194