Extrinsic 13409-2

{
  "heartbeat": {
    "blockNumber": 13408,
    "sessionIndex": 223,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x42c05e72fbb4a518b8c3286b0381fcb5bdd5b2cd74ade8e04811c35d04ee810827ae2f260131bc92a2611fdd04ea7f757f1807a09d77a5de669dbdc707028d8f"
}