curl --request PUT \
  --url https://api.hubapi.com/integrations/v1/{application}-id/timeline/event-types/{event}-type-id/properties

"\nAn example of a valid request to update an existing property could look like the following:\n\n{\n  \"id\":3,\n  \"name\":\"size\",\n  \"propertyType\":\"Enumeration\",\n  \"label\":\"Size\"\n}\n\nThe previous JSON will not make any changes to the property options. You can update a property and all its options in an atomic operation passing the options attribute:\n\n{\n  \"id\":3,\n  \"name\":\"size\",\n  \"propertyType\":\"Enumeration\",\n  \"label\":\"Size\",\n  \"options\":[\n    {\n      \"value\":\"xlarge\",\n      \"label\":\"Extra Large\"\n    },\n    {\n      \"value\":\"large\",\n      \"label\":\"Large\"\n    },\n    {\n      \"value\":\"medium\",\n      \"label\":\"Medium\"\n    },\n    {\n      \"value\":\"small\",\n      \"label\":\"Small\"\n    }\n  ]\n}"