BiologicallyDerivedProduct on the FHIR specification website.

A material substance originating from a biological entity intended to be transplanted or infused
into another (possibly the same) biological entity.

The body should be a valid FHIR object for BiologicallyDerivedProduct.

Here is an example:

{
  "resourceType": "BiologicallyDerivedProduct",
  "id": "example",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\">[Put rendering here]</div>"
  }
}

You can reference the FHIR documentation to determine the format for BiologicallyDerivedProduct.