Block top - The block number and length of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount to 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://social4geek.com/story6040641/5-easy-facts-about-blockchain-explorer-api-described-https-wikimapia-org-external-link-url-https-cryptoexplorerhub-com