Hi @TungTran,
Thanks for reaching out. Each Gallery API call will return different information based on the endpoint. For example, /v1/workflows/subscription/ will return information for every workflow in the provided subscription (studio). You can see the schema by expanding the endpoint you are interested in. Please see the screenshot. I recommend using the interactive docs you linked, plugging in your key and secret, and testing out the calls. You can also do this for your own Gallery. I hope that helps. If not, please feel free to engage our Customer Support.
Matt Braun
Product Manager - Enterprise