curl --request POST \
  --url https://api.pubrio.com/channels/templates/create_version \
  --header 'Content-Type: application/json' \
  --header 'pubrio-api-key: <api-key>' \
  --data '
{
  "channel_template_identifier": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "profile_id": 123,
  "channel_template_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "version_name": "default",
  "is_default": true,
  "parameters": {}
}
'

{
  "data": {
    "channel_template_id": 249,
    "channel_template_identifier": "4c717a78-26e9-49eb-ab2e-e1ce0755674a",
    "created_at": "2025-08-07T17:22:11.344Z",
    "version_number": 2,
    "is_default": true,
    "name": "Email Template",
    "channel_node_id": "93873c33-2635-4537-928c-6a4f3564164c",
    "parameters": {
      "content": "<div>hello world</div>",
      "subject": "hello world"
    },
    "version_name": "Default 2"
  }
}