Extrinsic 12397-1

{
  "heartbeat": {
    "blockNumber": 12395,
    "sessionIndex": 206,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xf8468a8f274ee8d2d17fbfaa0563bb5675fea6f74e8372ffb440b92e910225053f77329f8fed357481b76aa6dcf552ff028ce5fc7d8f2c39e07a2a2a7e67d98b"
}