{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x85d9e16422e3eb0eb47afabc0bc49dee9fee9ecf780bdd0707cc4c5603955c75",
    "signature": "0x4f0a2b5235e83e94e8127bd178d6b49589127539ed8ff7e3424cab0a10be854838c0441125f6bb86a88b5c0d00170de9e46c3bac1bb6d3e280e850424c6e832c1b",
    "signer": "0x7c5233DE7A8aD918D090BD36cC8C0e6273814D60",
    "userId": "559710456"
  }
}