Extrinsic 19663-1

{
  "heartbeat": {
    "blockNumber": 19662,
    "sessionIndex": 327,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9ef3847f52ccf7714e24b2a19b606ad80ead33ecc2be56b9ac5bc651178a4b1d9f0593ec546540f841ad9ed9e765e4e3a55afb43bec9108dd8e7614c91814389"
}