{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can offline signatures be used for payments in blockchain?","a":"Creating accounts and private keys: When using offline signatures for payment, you need to create a  blockchain account and generate a corresponding private key. The private key is a crucial piece of information used for signing and verifying transactions, which should be kept safe and avoid leakage."}]}],"pr":"29f9e8ce7be518a8b36e5acd7f98c73df5ca8660fa300245b8ac05147390dd4e"}