Extrinsic 41354-1

{
  "heartbeat": {
    "blockNumber": 41352,
    "sessionIndex": 689,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xdcd53a6764dd6bd4f4f82a116a7eeeaef093d1a483e0d135859d6330612e4a4b9bba600ed4e5a2d422405b136d7660ffa1d555031484b23ec48bc27ba11de08a"
}