Extrinsic 17386-1

{
  "heartbeat": {
    "blockNumber": 17384,
    "sessionIndex": 289,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x48c5595a63516e2cefa259a138ee622e9e91fc6eee928b6c4a253a9813a378563a55e235f9057635e0f7b1042bb5d8bcef7c6529003a41c6c57150aa108bf58c"
}