{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "513193189",
    "entityType": "User",
    "nonce": "0x59b16e230cf7ae007b2f20e8e96e5cfdfd8b340e714208989bf5d7c7ea6a00c4",
    "signature": "0x761bcf5e055f5b663bd6311c1ea177dcd3cce4742384c45e54b93fa79bc8ef4f29b510b95e0ac5b6e44ec00ff53f82263a1dec0539939678e159e4616efc8f091b",
    "signer": "0x3416E4B65cCfDd9cE7A5205f6a8A1E7F0Ff203d3",
    "userId": "885673575"
  }
}