Block top - The block number and length in the blockchain (in blocks) on development 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 truly be the a hundred and first transaction submitted https://wise-social.com/story5726471/5-easy-facts-about-blockchain-explorer-api-described-https-heavenarticle-com-author-pathpastor4-452336