{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of public keys in blockchain?","a":"Digital Signatures: Public keys can be used to create  digital signatures on data. By signing the data with the private key, the authenticity and integrity of the data can be ensured, allowing other users to verify the signature using the public key."}]}],"pr":"dda86915aad9e89aa7dd17c4d4400f6506c206280f9e46f21421828f2fb5132e"}