projectIds is empty, a global context is created. A global context is one that applies to all project. If issueTypeIds is empty, the context applies to all issue types.curl --location --request POST '/rest/api/3/field//context' \
--header 'Content-Type: application/json' \
--data-raw '{
    "description": "A context used to define the custom field options for bugs.",
    "issueTypeIds": [
        "10010"
    ],
    "name": "Bug fields context",
    "projectIds": []
}'{"id":"10025","name":"Bug fields context","description":"A context used to define the custom field options for bugs.","projectIds":[],"issueTypeIds":["10010"]}