| Base ID | Unique identifier of the base. Example: app1234567890 | Text | Yes |
| Table ID or name | Table ID or table name. Table names and table IDs can be used interchangeably, but table IDs are recommended so requests do not need to change when a table is renamed. Example: tbl1234567890 | Text | Yes |
| Record ID | Unique identifier of the record. Example: rec1234567890 | Text | Yes |
| Parent comment ID | Identifier of the existing comment that this comment replies to | Text | No |
| Comment text | Content of the comment to add to the record. Example: Great progress on this task! | Text | Yes |