{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa4cd15eb7c22fec161b2b28a3373b5e543db0a2201ea32921c60c256dc5a025a",
    "signature": "0xa758578edce36696f46168439e63e21d5b1733e0812f38eeab871b30c3593db645913e7334a81ef7e0814d55b2a6f5ee06a1fa1c32420dc31c8af6eddb703fa31c",
    "signer": "0xB48f32921b2A08f9EA15eaF1d1DFc9A33087528a",
    "userId": "308321023"
  }
}