Extrinsic 7425-1

{
  "heartbeat": {
    "blockNumber": 7423,
    "sessionIndex": 123,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x48e219539fe8d5cb66daa39c9b096dd16661b2477a2785e93cbb43daa5ed1e001545ca83af2110d64a3f656f055be3a7999d64012bf498b02f08fb78e5babe81"
}