Extrinsic 13541-1

{
  "heartbeat": {
    "blockNumber": 13538,
    "sessionIndex": 225,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xf0b539fa3b471036b88763bcfdb092d8cd06cfec271a0ab357eaf7fc23b3880101db7022da368dfd25d53330e81ead25b59ae5b5a0f45662287887cf4db75c8f"
}