{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x8a4c14798d629e6fa2cf328574d60ff17d1909a0fc902780cfac935709767602",
    "signature": "0xc1d1d8716d1dac97ff8c1a175c49809fc767347b852e7f7b68ce01f03ddb56790de5d6aa8cc14bc10da1ab2d9aedc4176650af938b8641ccaf820f3f3be8f80d1b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}