curl --request POST \
--url https://api.axiom.co/v2/vfields \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"dataset": "<string>",
"expression": "<string>",
"name": "<string>",
"description": "<string>",
"type": "<string>",
"unit": "<string>"
}
'