Extrinsic 1050-1

{
  "heartbeat": {
    "blockNumber": 1049,
    "sessionIndex": 17,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x10a237e475294ba4d30c1730a676d35ae2617e7aac80e20756c5e5f09ded257bd41f849efb1ea1a8bbe8eb38368d7ded615e645ed1b4ced85e91a46b7bce898f"
}