$.ajax - Issue with special characters (accents and ñ)

$.ajax - Issue with special characters (accents and ñ)

Hi, 

I execute the below function but when I get the string in TEST_JSON procedure (procedure un PL/SQL) the special characters arrive corrupted. My backend is IAS + mod_plsql with Oracle 10G R2 database (NLS_LANG = SPANISH_SPAIN.WE8ISO8859P1).

Where is the problem in the database or in $.ajax configuration?

Any help will be much appreciated !!
Thanks in advance.


$.ajax({
        url: "TEST_JSON",
        type: "post",      
        contentType: "text/html; charset=UTF-8",        
        data: {
            P_DATA: "special characters áéíóú ññ "
        },
        success: function(response) {
            console.log(response.dato);
        }
    });
}