curl --request POST \
  --url https://api.{your-broker}.slate-labs.com/customers/assign \
  --header 'Content-Type: application/json' \
  --data '
{
  "customer_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ],
  "role": "<string>",
  "new_agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "source": "manual",
  "note": "<string>"
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}