{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378297",
    "entityType": "User",
    "nonce": "0xa921fd20b876c0eb2baca3b0cb67bdd968de4b8b4616b4aed27df6b9cfdde619",
    "signature": "0x5f64a5eaa3170ccf5db3f828b9c638b5519c2911737d7c04bbe29cd138ba5c125686504aa0b3cc5a05f6c74afc4a82e5a475f3ebff1cdbfdd33655ba553d12761b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}