Extrinsic 34455-1

{
  "heartbeat": {
    "blockNumber": 34454,
    "sessionIndex": 574,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xe4510806bc05a642df68131a2762af384cabddbd8d2c8fd7870eb113c7807929381d02a6ec5365f831a256a87014b67c9d942795021ce9a281afd8d53c72b385"
}