By default this call will not create any meta fields even if there are required fields.

If you add the query parameter autoCreateMetaDefaults=true to this call then it will create the meta fields with their default or auto-numbering values as defined in the sample type. Note: meta fields in the sample type that don't have a default value or have auto-numbering enabled are not created.

If you don't want the sample to have a quantity you can leave out the 'quantitySettings'.