MerkleRootUpdated (bytes32 oldMerkleRoot, bytes32 newMerkleRoot)
[topic 0]:0xfd69edeceaf1d6832d935be1fba54ca93bf17e71520c6c9ffc08d6e9529f8757
[topic 1]:0x0000000000000000000000000000000000000000000000000000000000000001
0x21c3acf3bb349d044cef31102e1318fda9caf31212b540f17968ea5a492ffcfd