Issue with deserializing JSON for Jira REST API call

[Vasanta Kumaar]

I'm currently encountering an issue while trying to create a Jira issue via the Jira Service Management (JSM) REST API. Previously, my code was working fine, but now I'm getting an error related to deserializing JSON data.

Here's the JSON data I'm trying to send:

{
"serviceDeskId": 10,
"requestTypeId": 79,
"requestFieldValues": {
"summary": "Distribution list modification",
"description": "Test",
"customfield_13108": {
"value": "Szczecin"
}
},
"requestParticipants": "mwysocki"
}

And here's the error message I'm receiving:

"Can not deserialize instance of java.util.ArrayList out of VALUE_STRING token\n at [Source: org.apache.catalina.connector.CoyoteInputStream@3dd96618; line: 10, column: 6]"
 

It seems like the error is related to the requestParticipants field, but I'm unsure why it's occurring, especially since a similar JSON structure worked before without issues.

Any insights into what might be causing this issue or suggestions on how to resolve it would be greatly appreciated!

Thank you!