Extrinsic 25644-1

{
  "heartbeat": {
    "blockNumber": 25642,
    "sessionIndex": 427,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x828cf9ed977204b1ddc6347c835de92dcf2d1c5a78c5fe75137ee67ac0a79244713cd34db301ace5246db99b53807d8c4d025014391810f41fdf43f57957858f"
}