Extrinsic 1940-1

{
  "heartbeat": {
    "blockNumber": 1939,
    "sessionIndex": 32,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xcc1f90349f36949335e223d2bfa2420a2c127d121ec23a39cb84f029df776945b1f27861934a22b27e248352b9d0a36ed6043e11a8fff1276f8dac4fe3d7698f"
}