curl --request POST \
  --url https://api.onetsolutions.net/v1/organizations/{organization_id}/projects/{project_id}/compute/vpcs/{vpc_id}/ip-allocations/allocate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "instance_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "ip_address": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "vpc_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "vpc_name": "<string>",
  "ip_address": "<string>",
  "instance_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "instance_name": "<string>",
  "interface_index": 123,
  "allocated_at": "2023-11-07T05:31:56Z",
  "released_at": "2023-11-07T05:31:56Z",
  "created": "2023-11-07T05:31:56Z",
  "modified": "2023-11-07T05:31:56Z"
}