Extract data from json response

now i have json response from oracle service like following code { "Status": null, "RequestNumber": null, <b>"validationResults": [ { "code":E1000, "details":'Validation Error' } ]</b> } now i can read keys Status and request number like below <code> obj_rsp :=json.json(content_resp); v_status :=json.json_ext.get_string(obj_rsp, 'status'); v_req_no :=json.json_ext.get_number(obj_rsp, 'data.requestNumber'); -- /*v_resp_code :=json.json_ext.get_string(obj_rsp, 'validationResults.Code'); v_resp_desc :=json.json_ext.get_string(obj_rsp, 'validationResults.details');*/</code> i need to get <validation resultes> Code and details how could i do it ?