Extrinsic 197-1

{
  "heartbeat": {
    "blockNumber": 195,
    "sessionIndex": 3,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xe6b87ef4979c9c9f1fe45773e8c95204ad5f184e7c8d73dce8fab471b80c2e7a934cf51c6f9c522c801d6ecc28d587734e6374ada011078cd69664a9f41d3f8e"
}