{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663979320",
    "entityType": "User",
    "nonce": "0x837c4cccbb6088e5a22e0536965c01d890f60277278d353748e53a28c53ffaaf",
    "signature": "0x227fba96fb487a05a9e27d0a65f79bddc3741d83873e66b3c43aacbc68eae00420c5f81bab9316aa004815b0cf5196a025cdf5586af370841e4fecd6415f903b1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}