Extrinsic 20422-1

{
  "heartbeat": {
    "blockNumber": 20421,
    "sessionIndex": 340,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x44a4396f44e797177fab5f51997ae586624d0555c5d1813e06b0bdc0bbe81644983fc1d92fa7fb0e84e7e64e8436a0f86874f92e7b2e241d9f5186d2b2085c84"
}