{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12850",
    "entityType": "User",
    "nonce": "0xe538a46bfd6403774136cbf5da3d424f8dcf15ab9f6671d6763902563f6c19bf",
    "signature": "0x9a6005e750d2a7310b5345b728e344e692227d2d524a327be892fc5e9144d6a159a822f5a1630a806c10ceba4522e324d2624826c50457f2ccedbf228c0c31501b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}