curl --request POST \
  --url https://api.example.com/v1/crm/leads/{leadId}/validations \
  --header 'Authorization: Bearer <token>'

{
  "groups": [
    {
      "tabLabel": "<string>",
      "errors": [
        {
          "field": "<string>",
          "message": "<string>"
        }
      ],
      "warnings": [
        {
          "field": "<string>",
          "message": "<string>"
        }
      ]
    }
  ]
}