Try this POST : http://localhost:2990/jira/rest/zapi/latest/execution
Update the Body :
{
"13377": {
"id": 13377,
"orderId": 13377,
"executionStatus": "-1",
"comment": "",
"htmlComment": "",
"cycleId": -1,
"cycleName": "Ad hoc",
"versionId": 10001,
"versionName": "Version2",
"projectId": 10000,
"createdBy": "vm_admin",
"modifiedBy": "vm_admin",
"assignedTo": "user1",
"assignedToDisplay": "user1",
"assignedToUserName": "user1",
"assigneeType": "assignee",
"issueId": 10013,
"issueKey": "SAM-14",
"summary": "Test",
"label": "",
"component": "",
"projectKey": "SAM"
}
}