Extrinsic 68737-1

{
  "heartbeat": {
    "blockNumber": 68736,
    "sessionIndex": 1145,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x4a076f637c5dc4035e5fb1612a0fc8363568912b507fb25f637693543d05e17c2508a90513a38a55380b49f75ffbc7afe84af7f3244f617b44eee0ee5e4f0681"
}