Amazon SP-API Expert for Listing Updates

I need an experienced Amazon Selling Partner API (SP-API) developer for a small one-off task. On one of my listings (Amazon Italy), three structured attributes can't be updated through the Seller Central editor or flat file — they need to be set directly via the Listings Items API using a PATCH (patchListingsItem) operation. I have the exact SKU, marketplace, attribute names and the clean values to write. The job is simply to authenticate to my Seller account via SP-API and apply the three values, then confirm they are saved. Deliverable: the three attributes updated and a screenshot/confirmation of the saved values. Requirements: - Proven experience with Amazon SP-API, specifically the Listings Items API - You work via proper SP-API authorization (OAuth), NOT by asking for my Seller Central password - Available to start this week Fixed price, small job. To apply, please answer briefly: Have you used the patchListingsItem operation before? Which patch operation type (e.g. replace) would you use to set a single attribute, and how do you handle the productType requirement? (Generic answers will be ignored.)