{"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":"156452add86e3f060c5d0a4b456745208a420fc660149bcc4a2bba2a56ad62f5"}