How to model default or template resources?

[themodernlife]

Does anyone have thoughts on how a client could obtain a prepoulated, example resource?

For example, imagine an API for tracking inventory. The client will create a new InventoryCount resource each time they want to submit information about the in-stock inventory. Each InventoryCount has associated metadata such as the create_time, the user who did the count, etc.

message InventoryCountItem {
  string product_name = 1;
  float quantity = 2;
}

message InventoryCount {
  string summary = 1;
  google.protobuf.Timestamp create_time = 2;
  repeated InventoryCountItem items = 3;
}

When created client side, an InventoryCount will default to having an empty set of InventoryCountItems. However, the list of products is known in advance, and it would be preferable if the client could somehow download a templated or example InventoryCount, make modifications (e.g. update quantity, and then submit via CreateInventoryCount.