Export from Dragon Bones to Spine 3.3 format

[Mihail5412]

Hello! I would like to try to export my character from Dragon Bones to Spine format for using the Spine API. But I ran into a problem:

Error reading skeleton JSON file for SkeletonData asset: Hello_SkeletonData
The given key was not present in the dictionary.
at System.Collections.Generic.Dictionary`2 [System.String, System.
Object].get_Item (System.String key) [0x000a2] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:150
at Spine.SkeletonJson.ReadSkeletonData (System.IO.TextReader reader) [0x0006a] in D:\Program Files\Unity\PROJECTS\Testing\Assets\Spine\spine-csharp\SkeletonJson.cs:101
at Spine.Unity.
SkeletonDataAsset.ReadSkeletonData (System.String text, AttachmentLoader attachmentLoader, Single scale) [0x0001a] in D:\Program Files\Unity\PROJECTS\Testing\Assets\Spine\spine-unity\Asset Types\SkeletonDataAsset.cs:198
at Spine.Unity.SkeletonDataAsset.
GetSkeletonData (Boolean quiet) [0x000b2] in D:\Program Files\Unity\PROJECTS\Testing\Assets\Spine\spine-unity\Asset Types\SkeletonDataAsset.cs:153
UnityEngine.Debug:LogError(Object, Object)
Spine.Unity.SkeletonDataAsset:GetSkeletonData(Boolean) (at Assets/Spine/spine-unity/Asset Types/SkeletonDataAsset.cs:157)
Spine.Unity.Editor.
SkeletonDataAssetInspector:InitializeEditor() (at Assets/Spine/spine-unity/Editor/SkeletonDataAssetInspector.cs:115)
Spine.Unity.Editor.SkeletonDataAssetInspector:OnEnable() (at Assets/Spine/spine-unity/Editor/SkeletonDataAssetInspector.cs:75)
UnityEditor.AssetDatabase:CreateAsset(Object, String)
Spine.Unity.Editor.
SpineEditorUtilities:IngestSpineProject(TextAsset, AtlasAsset[]) (at Assets/Spine/spine-unity/Editor/SpineEditorUtilities.cs:1228)
Spine.Unity.Editor.SpineEditorUtilities:ImportSpineContent(String[], Boolean) (at Assets/Spine/spine-unity/Editor/SpineEditorUtilities.cs:667)
Spine.Unity.Editor.SpineEditorUtilities:OnPostprocessAllAssets(String[],
String[], String[], String[]) (at Assets/Spine/spine-unity/Editor/SpineEditorUtilities.cs:608)
UnityEditor.AssetPostprocessingInternal:PostprocessAllAssets(String[], String[], String[], String[], String[])
UnityEditorInternal.InternalEditorUtility:ProjectWindowDrag(HierarchyProperty, Boolean)
UnityEditor.DockArea:OnGUI()

I kind of found a problem. In the Spine-Unity API, I came across a function of the SkeletonDataAsset class, whose purpose is to convert from a Json.txt file, into an atlas file needed to work with the Spine-Unity API. But in my Json.txt file, which was given to me by Dragon Bones (of course I indicated that I want to export to Spine format), some data are missing,
when Json is deserialized.
Look on the screen( https://ibb.co/jVes6m ), the function searches inside my file (Json.txt) for the string [spine], but it is not there.