{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2852f2b21bd5dbf5dd5c1ae9b63c7ac4845494189f4a35a05c87ad46190aa60c",
    "signature": "0x2a6e4726dfad98d7e92c9912a642c20f8470f1a9cb7b8fdcd9a74be0f60e2ed679d1e9f2cc14aeccc8c7b3b7fcdbf8513479b09f65eec5d4bb5f30658f31def61c",
    "signer": "0x71FF041D39FBf54dcB92B8a3b3F30922817Da8cD",
    "userId": "201440251"
  }
}