{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are signatures implemented in blockchain?","a":"Transaction data preparation: The transaction  data to be signed is prepared, which usually includes the sender's address, recipient's address, transaction amount, and other relevant information."}]}],"pr":"c495ae5459e9598985e2e59132714b3d25d1be22f1e7e964dbeed71f7c8d2f52"}