How can we save an ADP data (having 3 records) into a single record using Rest API?

Summary:

We have a requirement to save an ADP data (having 3 records, 2 columns per record) into a single record using Rest API. Could someone please let me know how can we store these ADP column values into different static variables? So that we can use these static variables as Rest API parameters.

ADP_data[1].old := Variable1

ADP_data[2].old := Variable2

ADP_data[3].old := Variable3

ADP_data[1].new := Variable4

ADP_data[2].new := Variable5

ADP_data[3].new := Variable6

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