curl --location --request GET 'http://jira.local:8080/jira/rest//rest/api/3/issue//watchers'
{"self":"https://your-domain.atlassian.net/rest/api/3/issue/EX-1/watchers","isWatching":false,"watchCount":1,"watchers":[{"self":"https://your-domain.atlassian.net/rest/api/3/user?accountId=5b10a2844c20165700ede21g","accountId":"5b10a2844c20165700ede21g","displayName":"Mia Krystof","active":false}]}