curl --request POST \
  --url https://api.vocode.dev/v1/actions/update \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "config": {
    "phone_number": "<string>"
  },
  "action_trigger": {}
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "config": {
    "phone_number": "<string>"
  },
  "action_trigger": {
    "type": "action_trigger_function_call",
    "config": {}
  }
}