At the end there could be not zeroes. You just need to cut everything after zeroes.
I.e.
The NodeId is 12aTHGbgHd69BeonBQKe27biLUKYAZP1YhsJcHr11GervDPDq8A (from Disqualified without reason)
The base58 decode is 00cfa7cd72c1f7bff4e4f875f1344025904aab0f8f3c9e6e9d9a3c9cf0000000003f8ddddf, so you need to take only cfa7cd72c1f7bff4e4f875f1344025904aab0f8f3c9e6e9d9a3c9cf000000000