{
  "resourceType": "Substance",
  "id": "f203",
  "identifier": [
    {
      "system": "http://acme.org/identifiers/substances",
      "value": "1234"
    }
  ],
  "category": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/substance-category",
          "code": "chemical",
          "display": "Chemical"
        }
      ]
    }
  ],
  "code": {
    "concept": {
      "coding": [
        {
          "system": "http://snomed.info/sct",
          "code": "88480006",
          "display": "Potassium"
        }
      ]
    }
  },
  "meta": {
    "tag": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/v3-ActReason",
        "code": "HTEST",
        "display": "test health data"
      }
    ]
  }
}