diff --git a/custom_components/dash_cast/__init__.py b/custom_components/dash_cast/__init__.py
index 13a66c5..4b86397 100644
--- a/custom_components/dash_cast/__init__.py
+++ b/custom_components/dash_cast/__init__.py
@@ -1,3 +1,4 @@
+import voluptuous as vol
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_ENTITY_ID
 from homeassistant.core import ServiceCall, HomeAssistant
@@ -8,19 +9,21 @@
 
 DOMAIN = "dash_cast"
 
-CONFIG_SCHEMA = cv.empty_config_schema(DOMAIN)
+LOAD_URL_SCHEMA = cv.make_entity_service_schema(
+    {
+        vol.Required("url"): cv.string,
+        vol.Optional("force", default=False): cv.boolean,
+        vol.Optional("reload_seconds", default=0): cv.positive_int,
+    }
+)
 
 
 async def async_setup(hass: HomeAssistant, config: dict) -> bool:
     dashs = {}
 
     async def play_media(call: ServiceCall):
-        entity_ids = call.data.get(ATTR_ENTITY_ID)
-        kwargs = {
-            k: v
-            for k, v in call.data.items()
-            if k in ("url", "force", "reload_seconds")
-        }
+        kwargs = dict(call.data)
+        entity_ids = kwargs.pop(ATTR_ENTITY_ID)
 
         for entity in hass.data[DATA_INSTANCES]["media_player"].entities:
             if entity.entity_id not in entity_ids:
@@ -37,7 +40,7 @@ async def play_media(call: ServiceCall):
 
             dash.load_url(**kwargs)
 
-    hass.services.async_register(DOMAIN, "load_url", play_media)
+    hass.services.async_register(DOMAIN, "load_url", play_media, LOAD_URL_SCHEMA)
 
     return True