{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "420898398",
    "entityType": "User",
    "nonce": "0x1b5ba213d872b7c097cc89f7df293c068857d2eee633aa18d84f6eb009df1872",
    "signature": "0xd6d00187674e3c349e6e9275ea08f87f51731b5e7ee5445c581fc441da8e68f043856ad4a5d8687a01955a9f94d2c5d0a3b7871198cf51b8b109b5735bf01c141b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}