How to populate data in rest api for to create a po receipt

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How to populate data in rest api for to create a po receiptContent (required):

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We have below rest API to create a purchase order receipt , but is there any simple user guide on how to use this API.

If it is user screen , it is just finding eligible po"s by and input receipt quantity, but this api has multiple fields like po line id etc..

How to know the minimalist values that need to be populated ?