JSON script enhancement

How can I enhance this, I would like this action to only happen if CurrentField is equal to 'Registrat'

{ "$schema": "https://ift.tt/2SbrTHr", "elmType": "a", "txtContent": "@currentField", "attributes": { "target": "_blank", "href": "='https://ift.tt/348yKGC', + @currentField"

} }