curl --request POST \
  --url https://api.vocode.dev/v1/numbers/cancel \
  --header 'Authorization: Bearer <token>'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "inbound_agent": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "prompt": "<string>",
    "actions": [
      {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "config": {
          "phone_number": "<string>"
        },
        "type": "action_transfer_call"
      }
    ],
    "voice": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "voice_name": "<string>",
      "type": "voice_azure",
      "pitch": 0,
      "rate": 15
    },
    "initial_message": "<string>",
    "webhook": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "subscriptions": [],
      "url": "<string>",
      "method": "POST"
    }
  },
  "number": "<string>",
  "active": true
}