Adds contacts to the specified campaign. Optionally fixes US phone numbers by adding a leading 1 if not present.
Optional sub organization ID. Must belong to your main organization API key.
Will add 1 to the phone number if it doesn't starts with 1
When true, returns detailed contact information including phone numbers and status (created/updated) for each contact. Default is false (returns only contact IDs)
Array of contacts to create.
Number of contacts received in the request
Number of new contacts created
Number of contacts modified
List of IDs for contacts created or modified
Detailed contact information with phone numbers and status (created/updated). Only included when verbose=true