Is it possible to modify the data of an object using the HTTP POST method?

Yes, modifying an object's data using the HTTP POST method is possible and often used in practice. Although REST standards recommend using PUT or PATCH for updating resources, POST can also be used for modifications, especially when:

• The update is partial or complex and does not fit the semantics of PUT.
• The server processes POST requests to perform actions that change the state of an object.

For example, if you have an API for updating a user profile, you can send a POST request with the new data:

POST /api/user/123/update
Content-Type: application/json

{
  "email": "newemail@example.com",
  "name": "New Name"
}

Ultimately, the server will change the user's data. The main point is to understand that POST is a universal method for sending data to the server, and its use for updates is quite acceptable if it aligns with the API's logic.