{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390913",
    "entityType": "User",
    "nonce": "0x23a435c48ddd3a4617924781ee79c52f7c3ff2c764e7831898daa685b71a9d9a",
    "signature": "0xcf38386f6fc8aec93bdb3d67fa50f5d6971fd15fd5f41c9a510a07c3340c378c75425d4e1a0f19ac81ff6abcb72650757b7c95c333398a0f6cf3f836b56fc5dc1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}