Script needed to add an approver

Script needed to add an approver

I am attempting to get a script to add a specific email to only 1 level of approval.  When looking online all the examples give multi-tier approval.  I am below new when it comes to scripting so I am hoping for some help.  Here is what I have so far.

Custom Trigger:
When Subject = Create Server for Tier 2
Run script: python approver.py $COMPLETE_JSON_FILE

SETTING APPROVALS FOR DIFFERENT STAGES:
{
    "operation": [
        {
            "INPUT_DATA": [
                {
                    "StageOne": [
                        " approver@email.com",
                        ]
                },
               
            ],
            "OPERATIONNAME": "ADD_APPROVAL_STAGE"
        }
    ],
    "message": "Sample Python script for adding approvers",
    "result": "success"
}
SETTING APPROVALS FOR THE CURRENT STAGE:
{
"operation": [
{
"INPUT_DATA": [
],
"OPERATIONNAME": "ADD_APPROVAL"
}
],
"message": "Sample Python script for adding approvals in current stage",
"result": "success"
}

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