The Logging API allows you to report playback activity back to MassiveMusic, for the purposes of licensor royalty and usage reporting.
It is recommended to log streams in near real time, or the same day in batch. Before logging actual user data, your Client Success manager will support you through Compliance Testing to ensure logging accuracy and usage of the appropriate endpoint.
For clients with hundreds of millions of plays per day there is an alternative bulk logging process, which you can discuss with your Client Success manager.
The OAuth 1.0 signature base string includes the parameters from the request entity-body if the body is single-part and application/x-www-form-urlencoded. For example, a JSON body should not be included in the base string.
Reference: here