ValidatorRegistered (bytes publicKey)
[topic 0]:0x64b6e61d93b7a91e8cc4376183ede0997a27b44fd9dd2f30a866b2a5730efdb1
0x000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000308f439511e8e8242f75d7dc4a7bf2cc056a708080ba830142dd6debfa526c2b060e7863f332f07bcf7f6d5f2e47e1f68300000000000000000000000000000000