Top products in Vocal Blues:

Folk Singer

Muddy Waters

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Illuminations

Word Entertainment

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Songs from the Road

CD

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Great Ladies Of Jazz

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Koko Taylor

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The Essential Etta James

JAMES,ETTA

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The Earthshaker

TAYLOR,KOKO

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What It Takes: The Chess Years

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Blowin' in the Wind - The Gospel Soul of Etta James

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Shaking Off the Weirdness

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Get top products using API

ItemSearch API returns the top products in a browse node. Here, it returns list of top products for 5240:

https://amazon.commercedna.com/amazon.com/itemSearch/5240.json?awsId=***&awsSecret=***&searchIndex=Music&itemPage=1