Extrinsic 10122-1

{
  "heartbeat": {
    "blockNumber": 10120,
    "sessionIndex": 168,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x9e9f1211ef75eed3d77e5b47bf32177e56e9d75ba318fd91caafd3a3328f2f73982fa47ac7a6fe6c60526140b9a74c280ed7cbeef7c0ae31bc92d09ac6f7648e"
}