Block top - The block quantity and size in the blockchain (in blocks) on generation of the present block Nonce - The transaction number for the from address (bear in mind this commences at 0 so a nonce of a hundred would really be the a hundred and first transaction https://doctorbookmark.com/story20660105/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain