Block top - The block number and length in the blockchain (in blocks) on creation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://onelifesocial.com/story5984634/5-easy-facts-about-blockchain-explorer-api-described-https-hedgedoc-k8s-eonerc-rwth-aachen-de-0szjqhm8rceyuj2fq5ha9g