Extrinsic 20983-1

{
  "heartbeat": {
    "blockNumber": 20982,
    "sessionIndex": 349,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xe878d926d84d7826c8f2b72e455b11e3a665e31a6e47f2fec30137d6916e3a68298ffef077eb133c3801e39d4e7954320124ebd2389ecf1162f7203845a06789"
}