Extrinsic 7687-1

{
  "heartbeat": {
    "blockNumber": 7686,
    "sessionIndex": 128,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc8a034b799561d1248308f4bdfe4202016a51d915b1ca3bf1897f983e0fec92b6385f44e80bac56472ee99a1419df85e8dac102bb2fd150ce11c7f28a817a386"
}