The usage of the sinceId parameter has been deprecated as of August 15, 2019. If you are still using this parameter we recommend you upgrade to alternative ways of filtering your data as soon as you can.
Depending on your use case, we recommend the following alternatives:
Filtering using the sinceId parameter will not be supported in the Brandwatch Consumer Research product. Once you migrate to the Brandwatch Consumer Research, any API request that includes the sinceId parameter will fail.