Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (Keep in mind this commences at 0 so a nonce of 100 would basically be the 101st transaction submitted by this account) https://socialinplace.com/story5821466/explorer-blockchain-tron-an-overview-https-articlescad-com-the-remarkable-adventurers-in-the-cyber-frontier-grasping-distributed-ledger-instruments-325096-html