curl --request PUT \
  --url https://api.gcore.com/cloud/v2/loadbalancers/{project_id}/{region_id}/{load_balancer_id}/metadata \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "cost-center": "Atlanta",
  "data-center": "A"
}'

{
  "tasks": [
    "d478ae29-dedc-4869-82f0-96104425f565"
  ]
}