Extrinsic 25727-1

{
  "heartbeat": {
    "blockNumber": 25726,
    "sessionIndex": 428,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xe04feecb15071a6c71dc6035ba5678f1fe48cd034fdecd498f8cb25562d00107392ee71b1dff3e949e951b923ae2964965b08bfd419e6016a89b0ce749fedd87"
}