Details about the record. For example: Name = "Mark", Description = "Description".
///

Note: The fields/properties should be part of the schema/metadata created for the object(in this case, Name and Description should be a field in schema). The schema/metadata can be generated using schema manager API.

Refer to the following table to understand the behavior when you pass ID in the payload.

         | ID in payload? | Behavior | Validation |
         |----------------|----------|------------|
         | Yes            | Update a record by `externalId`. | The record's ID must match the ID provided in the payload. If not, give an error. Do not allow the ID to be updated in any case. |
         | No             | Update a record by `externalId`. | NA |