Extrinsic 6348-1

{
  "heartbeat": {
    "blockNumber": 6347,
    "sessionIndex": 105,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xc8da64d68bc462e89d4af0acbae920952157d14ea14662cb0fa1ecbe8629ec7402495c9a370032d312c46dd938b80df62a1f43efc060b773d24a53f7aed75480"
}