Extrinsic 17531-1

{
  "heartbeat": {
    "blockNumber": 17530,
    "sessionIndex": 292,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6206202d0ffb36996d864cb7e2d2a61ec17ac9f72157c3f1113f756b0ddb7379eda80a96cf0cfdb17eae8b402dc97b50d6eb1ca8c7095a2708416af8d49efc88"
}