Block top - The block variety and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction number for the from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://easiestbookmarks.com/story20380591/the-ultimate-guide-to-eth-blockchain-explorer-https-skitterphoto-com-photographers-1387379-jimenez-deleuran