{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "490080902",
    "entityType": "User",
    "nonce": "0xe0067c1c6e6767f00e6cf1e823822dee01d4a0df0b5a2f1c5cd81574a923d07c",
    "signature": "0x326050b2da90efe2e328c5308622aefba52b445fe3e32d71ef4432cca6675e064e859f8d60d2236e8cb559b1fa3c9d876d49d75fac6eaa988a89da45f8e394a71b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}