{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "344861033",
    "entityType": "User",
    "nonce": "0x781a4d6705b52c81723b2040ca264044274427c2b994410e564e8a53d3fd3e0a",
    "signature": "0xf99297df994fe9a7a2ecf1c5fe616b431680af2aa6c3c919d15fc6fdba44b8655e52f7553e30a8b851c5e70e442c2a054c5cd87a57d9b7b75a87b8117d9298a21b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}