Extrinsic 25537-1

{
  "heartbeat": {
    "blockNumber": 25533,
    "sessionIndex": 425,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xe2cbc9fe6538789455a8364ca819793e8d1991929d51f0b0a998f7234404d630c6248b0c54b66efb4a8c8e0a2c9b8d2c540ecdb24741d26863eb5969eccb3788"
}