{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5754eddf1caae5273866db2a7fc288b6efd97063b15d22086682866384354106",
    "signature": "0x3647c95d79c8f450d5119128a4c299102113b3dfbc5c057094dcb918ab1fd9bf6aa17b3dc6a092f3d237250fe22d29fc6654ea3a7cd345fbed3a6f9790a1a3c71c",
    "signer": "0xC89cE6634Ef8e97F29BDcd440807e4A5630dd360",
    "userId": "621546084"
  }
}