Hi Emilio,
if you create a new view that just shows Service Description and Service state, the json-Output will be correct.
Go to Customize → Views → Add view
Keep All services as Datasource and No restriction as Specific objects.
Set a new ID and Title and add Service description and Service state to your columns.
Click save and replace the allservices with your chosen ID from earlier.
Also you might need to add Hostname to the Columns, if there are multiple Hosts with the same Service Description.
Cheers Jeronimo