Extrinsic 20804-1

{
  "heartbeat": {
    "blockNumber": 20803,
    "sessionIndex": 346,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xf496fa65772d7b17e056bf0ea7349d07796c7919f7cd7e182dbfb0c57ea89550e06c8fee3c05db015b686f916e82eb3808946c3441049a90fe9857d6a9272a87"
}