Extrinsic 12508-1

{
  "heartbeat": {
    "blockNumber": 12507,
    "sessionIndex": 208,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb223191f3268f7d11a441c07b13effd53d685a5af35f5d48567a049a6eb4280941cdec6476f5fa2bdaddba031f6430ae187af2f2441b36a16e3b5874852d6284"
}