Extrinsic 5260-1

{
  "heartbeat": {
    "blockNumber": 5259,
    "sessionIndex": 87,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x302c76985853fe9a0662fe2177ea1e989f29fd696a3276486e6278e073bf355c2c6e13aaf32f438b00db8c83862cfbfa8acb67bedf5600be5df6c08e006eb980"
}