Extrinsic 246-1

{
  "heartbeat": {
    "blockNumber": 245,
    "sessionIndex": 4,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x6c85d0b8204270a102f88dfafd87b81243dbb46f2ae8b141d5a6e1f2fd0fe43f2ad45b8b7f8c0b33d173fedc9376af246193d92a82007264c53166379a664586"
}