How to read the unreadable info on URL

When i try to open the site, i usually get some junk (unreadable) data inbetween URl.How to find the exact meaning and where, why it is coming for.

For performance testing, it is requesting for ${recordRef} in place of unreadable data.

Below url is the sample, and highlighted is the data.

exampledev.appaincloud.com/.../lYBBXHnIAzvJNsJ8n_V2CdTFIgVW3uUpgSBXq7XIpgCDEq6fhGkl2FCltx7z6fkF8L4XaCufTwNcaD2hb7zVFHWb8czcdEIPpDAx5SAGI0HGGaCV8QdbA/view/summary

Please help me on this.

Thanks,

Malleswari

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