Extrinsic 20682-1

{
  "heartbeat": {
    "blockNumber": 20681,
    "sessionIndex": 344,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0202d2e9ca227548dc87f326c2b1db9b49dc5b9b3d6c264f85592b2d53a58138d32a5ed2e098116986415ca4715a3b9a8f38b1b0336a1992d5b1c72571270281"
}