Extrinsic 3229-1

{
  "heartbeat": {
    "blockNumber": 3227,
    "sessionIndex": 53,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x6af93120ea6935946ba1ebaac297c04faec6bf5119ee7f09d7f9e986c00fd32a6b411c4b0a4c63db4a0ee8b4691c388edcc6621b1e9ddea8b0d271e39f751e83"
}