First create a mapper :

import com.fasterxml.jackson.databind.ObjectMapper;// in play 2.3
ObjectMapper mapper = new ObjectMapper();

As Array:

MyClass[] myObjects = mapper.readValue(json, MyClass[].class);

As List:

List<MyClass> myObjects = mapper.readValue(jsonInput, new TypeReference<List<MyClass>>(){});

Another way to specify the List type:

List<MyClass> myObjects = mapper.readValue(jsonInput, mapper.getTypeFactory().constructCollectionType(List.class, MyClass.class));

Try this. This should do the work

ObjectMapper mapper = new ObjectMapper();
List<QuoteDTO> selectedQuoteDTOs = mapper.readValue(jsonSelectedQuoteDTOs, new TypeReference<List<QuoteDTO>>(){});

First, define POJOs for mapping your request object:

public class RequestObj implements Serializable{

    private List<Long> ids;

    private UsuarioDTO user;

    /* getters and setters here */

}

public class UsuarioDTO implements Serializable{

    private String name;
    private String email;

    /* getters and setters here */

}

And then modify your endpoint:

@PostMapping(value = "/sendToOficial")
public ResponseEntity<?> sendToOficial(@RequestBody RequestObj payload) {

In this way you also do not need to use an ObjectMapper. Just call payload.getIds().

Consider also that in this way if payload changes you'll need only to change RequestObj definition, while using ObjectMapper would force you to update also your endpoint in an important way. It's better and safer to separate payload representation from control logic.

http://www.baeldung.com/jackson-inheritance

You'll need to have those types inherit from one base class though.

Also; that is really bad JSON.