Powerautomate Create Contact

Hi to all. I use Copilot Studio for creating a custom copilot. At the escalation topic I use the create contact. Unfortunatelly the organization where the requester belongs can be updated only through Contact Custom Fields.
Because the Organization field in contacts is lookup can you help me to update the field?
If I create the JSON of the Field as:
{
"Organization": @{variables('OrganizationID')}
}
Or
{
"Organization": {
"__metadata": {
"type": "Collection(Edm.Int32)"
},
"results": [
@{variables('OrganizationID')}
]
}
}

I get Error.

I appreciate your help

Hello Nick,

I have informed our developers about the issue with the Organization field. I will get back to you as soon as I have more information to share.

Hello Nick! When updating the contact, you need to use property 'OrganizationId' and pass it an integer (ID of an accordant item in the 'Organizations' list).