How to test a Java RESTful web service with curl - problems with PUT verb

I'm trying my first Java RESTful web service and probably I don't have clear some mechanisms.

Here an example of my code:

@Path(Paths.USERS)
public class UserService {

    private static final String OK_MESSAGE_USERSERVICE_PUT = Messages.OK_MESSAGE_USERSERVICE_PUT;
    private Client esClient = ElasticSearch.getClient();

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public String get(@QueryParam(QParams.ID) String id) {
        // TODO Authentication
        try {
            GetResponse response = esClient
                    .prepareGet(PRIMARY_INDEX_NAME, USERS_TYPE_NAME, id)
                    .execute().actionGet();

            if (response != null) {
                return response.getSourceAsString();
            }


        }catch (ElasticsearchException e) {
            e.printStackTrace();
            return e.getMessage();
        }
        return Messages.RESOURCE_NOT_FOUND;
    }

    @PUT
    @Consumes(MediaType.APPLICATION_JSON)
    public String update(@QueryParam(QParams.ID) String id,
            @PathParam("metadata") String metadata) {
        // TODO Authentication
        boolean isMyself = true;

        // precondition, the user exsists. If the check fails, you
        // should put the isMyself flag at false.
        if (isMyself){

                    esClient
                    .prepareIndex(PRIMARY_INDEX_NAME, USERS_TYPE_NAME, id)
                    .setSource(metadata).execute().actionGet();
        }

        return OK_MESSAGE_USERSERVICE_PUT;
    }

My problem is:

How should I pass the metadata to the web service? I tried with

 curl -g -X PUT 'http://localhost:8080/geocon/users?id=007&metadata={"name":{"first":"james","last":"bond"}}'

but I encounter an error like

Root Cause: java.net.URISyntaxException: Illegal character in query at index 33: /geocon/users?id=007&metadata=%7B"name":%7B"first":"james","last":"bond"%7D%7D

    java.net.URI$Parser.fail(URI.java:2848)

Googling around, I've tried this different solution:

curl -X PUT -H "application/json" -d '{"name":{"first":"james","last":"bond"}}' http://localhost:8080/geocon/users/

but with this approach, I don't know how to pass to the web service my will of updating the user with ID 007 (since, AFAIK, I'm only communicating {"name":{"first":"james","last":"bond"}}).

How would you do? Thanks!