Block top - The block variety and size with the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://bookmarksfocus.com/story6258535/5-easy-facts-about-blockchain-explorer-api-described-https-cuwip-ucsd-edu-members-georgeuncle0-activity-1839979