Block top - The block number and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount for that from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://bookmarkinglive.com/story21474368/the-2-minute-rule-for-blockchain-explorer-solana-https-escatter11-fullerton-edu-nfs-show-user-php-userid-9253086