Block top - The block number and length with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://ok-social.com/story6380673/facts-about-tron-blockchain-explorer-revealed-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers