{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123439",
    "entityType": "User",
    "nonce": "0x5bb9403e2c03ea1a754da5da05b8af5091601f2ccf32151f17bc28b67f8c6ad0",
    "signature": "0xe7942d5fd9278a73d96dbca42212eb8ab6c1f09d33c30e04603a5c8179928a8216d1e009e72ccadce7394d1ffc86410238b0ec092c079a03d45c60597a92086f1b",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}