Extrinsic 20966-1

{
  "heartbeat": {
    "blockNumber": 20965,
    "sessionIndex": 349,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x1056f6ad01c7b8f9950046103895c2449ac18f2a7d56dfa6d27342ea15ab6d6618092c50b34181871e26d50e9aa4687db08369a9aeaddc07af944c71e1cff985"
}