Block top - The block range and duration of the blockchain (in blocks) on creation of the present block Nonce - The transaction number 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://captainbookmark.com/story20389626/5-easy-facts-about-blockchain-explorer-api-described-https-gaiaathome-eu-gaiaathome-show-user-php-userid-1577569