Orchestrator 2022 passing parameters to runbook with API

Question

Trying to call a runbook on Orchestrator 2022 with Powershell and pass parameters to runbook. I need to pass multiple parameters, but started with just one. It works fine when I remove the parameter from the runbook's Initialize Data and the Powershell API call, but as soon as I add it I get (400) Bad Request. Partial code below (removed some variable declarations for privacy):

$body = @{  
  
RunbookId = "0E3D0830-5BB6-4717-BB94-330E0338F153"  
  
Parameters = @{  
    "457F99B3-1267-4848-A91B-5F4B746BA1EA" = $Action  
    }  
  
CreatedBy = $null  
  
} | ConvertTo-Json  
  
Invoke-RestMethod -Uri ('{0}/api/Jobs' -f $OrchURI) -Body $body -Method Post -ContentType 'application/json' -UseDefaultCredentials  

Answer 1

$body = @{
    RunbookId = $adminRoleRunbookId
   # RunbookId = $runbookId  
    RunbookServers = @($runbookServer)
    Parameters = @(
                [pscustomobject]@{Name='Reason';Value='Some text'},
                [pscustomobject]@{Name='User';Value='Some user'},
                [pscustomobject]@{Name='Version';Value='Some version'}
                )
    CreatedBy = $null 
} | ConvertTo-Json