Using a Map field

I have a schema that looks like -
```
let jobSchema = mongoose.Schema({
jobuuid: { type: String },
type: { type: String },
jobDetails: { type: Types.Mixed },
jobOptions: {
type: Map,
of: JobOptionsSchema
},
})
```
And trying to use a mutation that looks like -
```
mutation{
createJob(record:{jobOptions:{name:"demo"}}){
recordId
}
}
```
But im getting an error-
```
{
"errors": [
{
"message": "job validation failed: jobOptions: Cast to Map failed for value \"[Object: null prototype] { name: 'matthew' }\" at path \"jobOptions\"",
"locations": [
{
"line": 2,
"column": 3
}
],
"stack": [],
"path": [
"createJob"
]
}
],
"data": {
"createJob": null
}
}
```
Did something change with how to use the Map field?