SigningKeyRemoved (index_topic_1uint256 nodeOperatorId, bytes pubkey)
[topic 0]:0xea4b75aaf57196f73d338cadf79ecd0a437902e2dd0d2c4c2cf3ea71b8ab27b9
[topic 1]:0x0000000000000000000000000000000000000000000000000000000000000acd
0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000030b001bf68ead3c27408b8b1ddaf302212ce6ad05ecd6aabae81b6062448af99f5332561162e2b63767488e50bb4813c2f00000000000000000000000000000000