Extrinsic 19968-1

{
  "heartbeat": {
    "blockNumber": 19967,
    "sessionIndex": 332,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xe078de93bab257bfdda0e0cde3a083de7a1d397e93afed736c18c68f27ce147747374d4d1bbf3393f85f87151e189c99cd1f144d4cffc63a95ed3c7428c9538d"
}