Extrinsic 20243-1

{
  "heartbeat": {
    "blockNumber": 20242,
    "sessionIndex": 337,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9652d5da0bcbd5651f98400754173bc45ccd93e7766e7111bc9d4f564184ad5d7fe798fd259a689cacd019b3cd68139d5ebee70fafd05eb4be592931e9114b82"
}