{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304857543",
    "entityType": "User",
    "nonce": "0x1d72353f6435391e6da03209088254a8193b1f3c7ea90387d40297ee1f114acd",
    "signature": "0x43b81999a3331b88515caa6cf8042cb3e22d1b099a0688325d5a2bd59487bfc906d18f8782b4a394ef8bfcc76fb8f12d8c94b8a7a06791377cf778437c39f8d91c",
    "signer": "0xEb97202446fA641dF1494AFDFcD92e03878D7f16",
    "userId": "103041929"
  }
}