Extrinsic 1969-1

{
  "heartbeat": {
    "blockNumber": 1967,
    "sessionIndex": 32,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc8a537110b70dfc57e8447801437e360353bf9d4a69347ee2144b811a362af632908f5338022539a0ec35398d7e2b302c9fb1887ee4782a1a3a5341571dbbe84"
}