How to create vector out of structured json data

I have a json data which is having close to 70 key-value pairs. If i want to create vector out of this may be 70% it will be meaningless.

Currently i am converting this 70 key-value pairs into a dummy raw sentence and putting it into a field. And that field i am converting into a knn vector field. Is there any better way to convert the structured JSON dataset/documents in vector?

If above used approach is a right approach?

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