{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the format of the message?","a":"Signaling: Used to control and maintain the transmission process  of messages, such as sending requests, confirming receipt, retransmission, etc."}]}],"pr":"8e0c8b422c585f38742fc90e419885e690c5d43096e4cc78a01e6059892c2db2"}