Extrinsic 16286-1

{
  "heartbeat": {
    "blockNumber": 16284,
    "sessionIndex": 271,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x641521fe7397bd9c53ac2a3c3c232643fdfe38b492ea8b325a10251f5f831f26c1bbedc9f23b06fe73aefcbfe4343ac97fba7d02945b90d4c4474af4fdcb8f88"
}