The Splunk Universal Forwarder can be configured to monitor the logs/dsstats.json file and forward the metrics to Splunk. Under the Splunk Forwarder application files, update the etc/apps/search/local/inputs.conf file with the following configuration for dsstats.json:
[monitor:///path/to/PingDirectory/logs/dsstats.json]
sourcetype=log2metrics_json
index=pdmetrics
disabled=false
host=pd1

The index name can be customized, and the host value can be configured to label where the metrics are being forwarded from.