try either pointing to a TV
[
{"caption":"Info", "fields": [
{"field":"title","caption":"Title"},
{"field":"description","caption":"Description","inputTV":"GalleryTitle"}
]},
{"caption":"Image", "fields":[
{"field":"image","caption":"Image","inputTV":"GalleryImage"}
]}
]
or without any defined TVs, just by defining the inputTVtype
[
{"caption":"Info", "fields": [
{"field":"title","caption":"Title"},
{"field":"description","caption":"Description","inputTVtype":"richtext"}
]},
{"caption":"Image", "fields":[
{"field":"image","caption":"Image","inputTVtype":"image"}
]}
]