curl --request PATCH \
  --url https://api.planetscale.com/v1/organizations/{organization}/databases/{database}/branches/{branch}/changes \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "cluster_size": "<string>",
  "replicas": 123,
  "parameters": {}
}'

{
  "id": "<string>",
  "restart": [
    123
  ],
  "state": "queued",
  "started_at": "<string>",
  "completed_at": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "actor": {
    "id": "<string>",
    "display_name": "<string>",
    "avatar_url": "<string>"
  },
  "cluster_name": "<string>",
  "cluster_display_name": "<string>",
  "cluster_metal": true,
  "replicas": 123,
  "parameters": {},
  "previous_cluster_name": "<string>",
  "previous_cluster_display_name": "<string>",
  "previous_cluster_metal": true,
  "previous_replicas": 123,
  "previous_parameters": {},
  "minimum_storage_bytes": 123,
  "maximum_storage_bytes": 123,
  "storage_autoscaling": true,
  "storage_shrinking": true,
  "storage_type": "gp3",
  "storage_iops": 123,
  "storage_throughput_mibs": 123,
  "previous_minimum_storage_bytes": 123,
  "previous_maximum_storage_bytes": 123,
  "previous_storage_autoscaling": true,
  "previous_storage_shrinking": true,
  "previous_storage_type": "<string>",
  "previous_storage_iops": 123,
  "previous_storage_throughput_mibs": 123
}