Extrinsic 16306-1

{
  "heartbeat": {
    "blockNumber": 16304,
    "sessionIndex": 271,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x1adc3fae2fd74fd2d48665f69d4d9d46197c9ac2dbdddad9b8df7754e95780712a2a05d14dee05fc91d567f255dfd26b8eeeceb82e61fff82fd9cdfa328baf86"
}