Request using PREDEFINED_PERIOD = LAST_YEAR returns empty json {}

[mattiaferrari02]

I tried this request

grpcurl -protoset fd.bin -d '{ "time_range": { "predefined_period": 7  }, "market_ids": ["6977"], "reference_currency": "usd", "page": { "page_size": 900 }, "time_frame": 5  }' stage-tdex-analytics.xdex.ch:443  tdexa.v1.Analytics/MarketsPrices 

Tried also the request with different maket ids 6977, 6976, 6978. And i tried also changing the page_size. But the response doesn't change
but it returned an empty json, did I do something wrong?