{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2f9973f85d2fe66ef760c69bcf1429898db48ed6e88a4e95790a1862745a9d51",
    "signature": "0xf874e82eb6242c82178a87193c5032b24c6c81de5250a8e0b6f67c45a35735cc233927d6ba518ce62786686306436c3a17b8f916f72ff42eb1074d71ad75f6d91b",
    "signer": "0x64eDE648789ea631B348704eE66B261C40E0475c",
    "userId": "478634024"
  }
}