API function that returns JSON

Hi. How can I achieve an API function that will return full JSON. 

Now I get the oData value property, but its content is not in JSON and in the external component there is no way to transform it to proper JSON. 

{
	"@odata.context": "https://dev.esm.app.br/indicium/sf/esm_dev/$metadata#ESM.subroutineScalarResult",
	"value": "[{\"org_id\":2,\"org_name\":\"LEF\"},{\"org_id\":10,\"org_name\":\"Servicedesk\"},{\"org_id\":11,\"org_name\":\"Sistemas\"},{\"org_id\":13,\"org_name\":\"Contratação\"},{\"org_id\":16,\"org_name\":\"Change Manager\"}]"
}