Extrinsic 55222-1

{
  "heartbeat": {
    "blockNumber": 55221,
    "sessionIndex": 920,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x5c3de25f1eb1e308152b170c7cf681c3a6279977925c34e298c893c547002a349657d2ec829ce76f676953b2a4de29a89e69103cbd7dcfef6b3a7892757de186"
}