Extrinsic 43446-1

{
  "heartbeat": {
    "blockNumber": 43445,
    "sessionIndex": 724,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x50851f03f1c78714135654cb872b68e58bff674308e9064df5d39e605ef0e42fbb47bdc293335da0587d260b836b68da2b9d2f9d15ebbe68cdd8c00248910588"
}