{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xbe308eddb82a2d9437e9ba012b9718bcebf0c1398c6500ec1e248c309d6c4128",
    "signature": "0x5adee50e9418b8a7e25f40653a505716bf903e52047c2bea6d164ff16cff146e1f7a30f99fbc7cac55159f8732cb5c8ac69692f4737c709aaf7649074e55bf861c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}