Json – my @RequestBody annotation is not parsing my object

I am having a problem, where I send a request with a Json body, and the parser is not changing that Json into the desired Java object, it is returning that object with all the parameters null:

This is the request from postman:

POST http://localhost:8084/api/user/user

body: {
    "name": "Santiago",
    "email": "yes",
    "number": "4",
    "password": "rftgybn",
    "date_of_birth": "2024-11-06T12:30:00Z",
    "location": "Medellin"
}

This is the request shown by my springboot filter I made (I made it so I could verify the request is correct, the problem existed before making that filter):

POST "/api/user/user", parameters={}

Request Body: {
  "name": "string",
  "email": "string",
  "number": "string",
  "password": "string",
  "date_of_birth": "2024-11-07T11:27:15.086Z",
  "location": "string"
}

This is my DTO object:

@Getter
@ToString
@NoArgsConstructor
public class UserRegisterRequestDTO {
    @JsonProperty("name")
    private String name;
    @JsonProperty("email")
    private String email;
    @JsonProperty("number")
    private String number;
    @JsonProperty("password")
    private String password;
    @JsonProperty("date_of_birth")
    private Date dateOfBirth;
    @JsonProperty("location")
    private String location;
}

This is my controller method that is being invoked:

@RestController
@RequestMapping("/user")
@CrossOrigin(origins = "*")
public class UserControllerImplementation implements UserController {
    @Override
    @PostMapping(produces = "application/json")
    public ResponseEntity<UserBasicDTO> createUser(@RequestBody UserRegisterRequestDTO user) {
        System.out.println("nnCreating user");
        System.out.println(user);
        return ResponseEntity.status(HttpStatus.CREATED).body(userService.createUser(user));
    }
}

Those System.out.println() are printing the following:

Creating user
UserRegisterRequestDTO(name=null, email=null, number=null, password=null, dateOfBirth=null, location=null)

I have been trying for a day now, and I do not know what else to do. Please help, and thanks a lot!