curl --request POST \
  --url https://api.example.com/api/cost/v1/billingtags \
  --header 'Content-Type: application/json' \
  --header 'X-Domino-Api-Key: <api-key>' \
  --data '
{
  "billingTags": [
    "<string>"
  ]
}
'

{
  "billingTags": [
    {
      "tag": "<string>"
    }
  ]
}