Extrinsic 18814-1

{
  "heartbeat": {
    "blockNumber": 18813,
    "sessionIndex": 313,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xacd627bf6522e2a0efd26501345f9ef230015a973f9b448feef5097fb156b85c9319fca99a06e75c886a98e3b4f98f04ab45da2825728db5369e9a934e6e7686"
}