{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc7397e4bb35b0f5a161ada4d016cdaa64f061e98a0ee6a509149635928094a5e",
    "signature": "0x2aa850e740554f8c23816d49bfbc14c2eb867ed0c601a3bca7cf8fcfda37472f502dcc06e37ea7e3a743b80af13e594ec9430fb239f2baf2a0e791652f3ba3221c",
    "signer": "0xEB82b0B3E0C8Ca35edDe7c7AE5940999f64e5493",
    "userId": "2021159"
  }
}