Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount 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://bookmarkstime.com/story20820410/5-easy-facts-about-blockchain-explorer-api-described-https-forum-issabel-org-u-optionray7