Conditional Create\Update\Delete

Number of APIs: 4

1. Conditional Update Search PUT {{host}}/fhir/Observation?_id={{fhir_observation_id}}

2. Conditional Delete Search DELETE {{host}}/fhir/Observation?_id={{fhir_observation_id}}

3. Conditional Post POST {{host}}/fhir/Observation

4. Upsert PUT {{host}}/fhir/Observation/{{fhir_observation_id}}