Hi Navin,
EntityID in the Adobe Experience Platform API is a unique identifier associated with a specific entity (e.g., a user profile). It helps you look up and interact with an entity in the Experience Platform.
When using the API to access a profile, you can use the EntityID in one of the following ways:
Native XID lookup: If you're using a native Experience Cloud ID (ECID) to look up a profile, set the entityId parameter to the ECID value (e.g., entityId=GtghAUFkdGVzdDE) and leave entityIdNS absent.
ID:NS (ID-Namespace) lookup: If you're using an ID-Namespace combination to look up a profile, use both entityId and entityIdNS fields. The entityId will be the unique identifier for the profile in the specific namespace, and entityIdNS will be the namespace ID.
By providing the appropriate EntityID and, if needed, the entityIdNS, the API will be able to locate and return the profile information you're seeking.