{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664492524",
    "entityType": "User",
    "nonce": "0x74ebbd1de7d97731b4f61e0f3145a96d359c856f55d938fe3eef134ade708087",
    "signature": "0x9311f86b00390e7b1869f51222266d17a795141247aa335995cb7d98d414dc06193f2d1cf82827add3476f29a394129b460ffd72fea5c5eeea2660af9e177e821c",
    "signer": "0x97Ce19D122F5b51231cF4DBbd25Ac36CBDd6CACa",
    "userId": "426864186"
  }
}