curl --request POST \
  --url https://api.thundercompute.com:8443/v1/instances/{id}/modify \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{}'

{
  "identifier": "<string>",
  "instance_name": "<string>",
  "gpu_type": "<string>",
  "http_ports": [
    123
  ],
  "mode": "<string>",
  "num_gpus": 123
}