curl --request POST \
  --url https://api.example.com/organizations/{organization_id}/tickets/{pk}/unassign/ \
  --header 'X-Initdesk-Token: <api-key>'

{
  "id": 123,
  "inbox": {
    "id": 123,
    "name": "<string>",
    "email_prefix": "<string>"
  },
  "customer": {
    "id": 123,
    "name": "<string>",
    "email": "jsmith@example.com",
    "is_spam": true
  },
  "assignee": {
    "id": 123,
    "email": "jsmith@example.com",
    "name": "<string>"
  },
  "public_id": 123,
  "subject": "<string>",
  "summary": "<string>",
  "customer_visible_reply_count": 123,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "csat_response": {
    "rating": 123,
    "comment": "<string>"
  },
  "attachments": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "download_url": "<string>"
    }
  ],
  "tags": [
    "<string>"
  ],
  "has_attachments": true,
  "created_by": {
    "role": "<string>",
    "user": {
      "id": 123,
      "email": "jsmith@example.com",
      "name": "<string>"
    }
  },
  "external_recipient_emails": "<unknown>",
  "description": "<string>",
  "description_html": "<string>",
  "language": "<string>",
  "is_spam": true
}