Extrinsic 2448-1

{
  "heartbeat": {
    "blockNumber": 2446,
    "sessionIndex": 40,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xe82402912b28b495420ba5b7557c7b2bf158737fe78d47091994952dbd70bc1dd9323dd60393cc12005e259a4ebcadff49847d1e962f7220974ecdc34935fa8e"
}