put
https://api.ytel.com/v4/contact/
Edits a contact.
Similar to uploading a list, this has an optional conflictMode parameter (default REPLACE). Using REJECT will result in an error. Using APPEND will result in the existing contact data remaining with new key/value pairs being added. OVERWRITE will replace existing key/value pairs but not remove existing ones.
In any case, only non-null fields that are passed in will be updated.