Extrinsic 8927-1

{
  "heartbeat": {
    "blockNumber": 8925,
    "sessionIndex": 148,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xee3dd336083831e72cc9ea61b3a7d8070fbad13ef641d163074e8ed998ec0705f96aa28f1f560fc36587d6a4251395ca829f42f8a1cf99a443ae4cde8c787d87"
}