Extrinsic 1753-1

{
  "heartbeat": {
    "blockNumber": 1752,
    "sessionIndex": 29,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc056f8dc7a72bea17f165d8b477821823d5b028c343c638be67a3f63500c2e080f30061c92a6462598ca3e9cedea0decd8af180d11b8afb4c250b1a93f745584"
}