Before you can add an item to the ORCID record you will need to format your data into the ORCID schema. Format your data in the ORCID message schema in XML or JSON.
Our GitHub repository contains resources that will help with formatting when creating new items on the ORCID record, and when reading existing items on the ORCID record:
Note that different versions of the API have different message formats. Version 2.0 and 2.1 schemas and examples are also available.
More examples can be easily found by reading the metadata of a well populated record.