Optional. The signature of the sender of the query request, computed over the serializedClientQuery bytes. If this field is omitted, the query is treated as anonymous, and only public information will be returned.
The signature is verified by the server only if the sender identifier is provided in the ClientQuery. The signature is rejected if expiry time in the serialized ClientQuery is missing, is in the past, or more than 5 minutes in the future.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-09-15 UTC."],[],[]]