curl --location 'https://demo.traccar.org/api/attributes/computed' \
--header 'Content-Type: application/json' \
--data '{
"attribute": "string",
"description": "string",
"expression": "string",
"id": 0,
"type": "string"
}'{
"attribute": "string",
"description": "string",
"expression": "string",
"id": 0,
"type": "string"
}