Extrinsic 370-1

{
  "heartbeat": {
    "blockNumber": 367,
    "sessionIndex": 6,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xf26c0f524b9f0e2f0df75f59d9f193c8067b1ab6ac5db826b18b61661ab3c14d08c23f42b5cf73dbccc3c0ea7946fd98ce100001be7bfcb624ac63d1fec72c8e"
}