Need API and sample payload to Approve, Reject Purchase Requestion

Hi Team,

We are collaborating with the Integration team to build the Purchase Requisition and Change Order functionality. To move forward, I need the following information:

1. API Details: Could you please provide the API documentation relevant to the Approve and Reject operations?
2. Sample Payload: It would be helpful to have sample payloads for these operations.

Additionally, since Purchase Requisition involves a multi-level approval system, I would like to understand how we can retrieve the details of the next level approver and perform the Approve operation accordingly.

Any suggestions or guidance on this would be greatly appreciated.