Extrinsic 40308-1

{
  "heartbeat": {
    "blockNumber": 40306,
    "sessionIndex": 671,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xb4861aa18d0eaa853755fe5ce30351b18fae1ec94e6758045b9463a5cc6c93779cc1150b94f3045266643bac1f4d4f0e66cdd8a6c9e0285804689e930809f587"
}