Block top - The block number and duration on the blockchain (in blocks) on development of the present block Nonce - The transaction selection with the from address (Remember this starts off at 0 so a nonce of a hundred would basically be the 101st transaction submitted by this account) https://doctorbookmark.com/story20398959/facts-about-tron-blockchain-explorer-revealed-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers