Extrinsic 25270-1

{
  "heartbeat": {
    "blockNumber": 25268,
    "sessionIndex": 421,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x86af2207e6515032ff927e1070ccad6d3943d37a1510f77b76e07872ee9a867e1438c0fb2c7fea48b37acf8d131e6608010a0ff94954ccd1bff314a67c91fe8f"
}