Extrinsic 3432-1

{
  "heartbeat": {
    "blockNumber": 3430,
    "sessionIndex": 57,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x5673c77723255142130a4f286b9b8d0b28d8bb6315bc25b675941b193be5f945973e770e5f1e9f5ea91051b33a58db634f4df134066e50fcd6c1237d89ab6b83"
}