curl --request POST \
  --url 'https://api.example.com/api/v1/contact_custom_field?api_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "org_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "custom_field_name": "<string>",
  "custom_field_type": "string"
}
'

{
  "message": "Data created successfully",
  "meta": {},
  "data": {
    "org_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "custom_field_name": "<string>",
    "custom_field_type": "string"
  }
}