Does anyone know how to give JSON input to the v3 API and have it work? I've been bashing my head against the wall all day.

$inputData = @"

{

"operation": {

"details": {

"resolution": {

"resolutiontext": "Test text here."

}

}

}

}

"@

$inputData =  $inputData | ConvertTo-Json -Depth 50

$postparams = @{OPERATION_NAME='ADD_RESOLUTION';TECHNICIAN_KEY=$apikey;INPUT_DATA=$inputData;FORMAT='JSON'}

Invoke-RestMethod -Uri "$URI/api/v3/requests/498420/resolutions" -Method POST -Body $postparams -ContentType "'application/json"