{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of digital signatures in blockchain transactions?","a":"Non-repudiation: Digital signatures enable the  originator of a transaction to prove that they participated in the transaction"}]}],"pr":"2a407ce7f99ad7d665c01b8f63937e2de42b5b1802264769a4479653da508255"}