{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456716469",
    "entityType": "User",
    "nonce": "0xeef00f84f6ff97d7780ceb8d6f412e4123b63567c14c2b52bcc7ec6d650a377a",
    "signature": "0x687bce38ac622fc3e3ca53be6f36a8eb318116f6df9537b6552e17098c01865e3aeafe1b2b608363990b2c64c690e9987bd1ddfe22e8f8a54b0514ffa1fd898f1b",
    "signer": "0xc4A500E17D812B285447720CCcb7F8eB148c91bd",
    "userId": "256479919"
  }
}