HTTP POST Powershell send JSON

post.ps1

$ExampleVariable1 = "..your data here..";
$ExampleVariable2 = "..your data here..";
$ExampleVariableN = "..your data here..";

$url = 'https://..your url here..';

$requestBody = @{
    ExampleVariable1 = '$(ExampleVariable1)'
    ExampleVariable2 = '$(ExampleVariable2)'
    ExampleVariableN = '$(ExampleVariableN)'
}

$json = $requestBody | ConvertTo-Json

#POST 
Invoke-WebRequest -UseBasicParsing $postToDashboardUrl -ContentType "application/json" -Method POST -Body $json

#GET
Invoke-WebRequest -UseBasicParsing $postToDashboardUrl -ContentType "application/json" -Method GET -Body $json