patch https://fhir-api.zapehr.com/r4b/SubstanceDefinition/
SubstanceDefinition on the FHIR specification website.
The detailed description of a substance, typically at a level beyond what is used for prescribing.
The body should be a list of valid JSON patches for SubstanceDefinition. For example, to update a Slot status to busy, this would be the body:
[
  {
    op: 'replace',
    path: '/status',
    value: 'busy',
  },
],
