{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2154",
    "entityType": "User",
    "nonce": "0x10f455e14c73fa55fe13dd06c8b7b470dec2abcf43322fb40c86695878d63f6a",
    "signature": "0x578919a397dc5d32c89a3c9dc00b74ba0fd7ff5b9c715924e6a4f4ddd8bd7dca6856ad818bcb5ba6ab5bae6d99d48f1396a746cbabd6d199e6199a95029b50771b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}