{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xaccfb018f772d30d3b9b1e021c0c42d8c6877a81cafa3c8d11b06307a5c74513",
    "signature": "0xec3f5f5006666214816c19fa268379dffec5775c941f0373670eb952a03842c82f64e59150fe4ffc466e1b0ea97eae2b800056fc6be9242ce438ab2092bd274f1b",
    "signer": "0x4C0e8973cC8C5BB66d6627C8D489e336f0825A94",
    "userId": "939865626"
  }
}