How to configure LWC to accept and map a JSON string as Input variable

I am trying to modify my LWC, which launches a Flow, to accept a JSON string as input with any variables that I want to pass to the flow defined in the JSON string. Reason is to allow the LWC to be very flexible vs listing each variable name I wish to pass into each different flow.

I have two inputs flowName which is working fine and flowParams which is supposed to be the JSON string.

1. I do not think the get inputVariables() is written correctly and likely needs to map the string? If so I do not understand what that should look like.

<template>
    <lightning-flow
        flow-api-name={flowName}
        flow-input-variables={inputVariables}
        onstatuschange={handleStatusChange}
        flow-finish-behavior="NONE"
    >
    </lightning-flow>
</template>

import { LightningElement, api } from 'lwc';
import { ShowToastEvent } from 'lightning/platformShowToastEvent';

export default class CardNpiSingFlowCmp extends LightningElement {
  @api flowName;
  @api flowParams;

    get inputVariables() {
      return this.flowParams;
    }
    
    handleStatusChange(event) {
        if (event.detail.status === 'FINISHED') {
            // set behavior after a finished flow interview
        }
    }
}

2. In the Properties for the LWC what the JSON string should look like when passed in?

[{ name: 'varEntryPoint', type: 'String', value: 'lwcType1' },{ name: 'varTwo', type: 'String', value: 'lwcType2' }]