contentType
The Content-Type for encoding a specific property. Default value depends on the property type:
for string with format being binary – application/octet-stream;
for other primitive types – text/plain
for object - application/json
for array – the default is defined based on the inner type. The value can be a specific media type (e.g. application/json), a wildcard media type (e.g. image/*), or a comma-separated list of the two types.