Bad request (HTTP error 400) when save form with radio-buttons

[belarmino_silva]

the endpoind is /activiti-app/app/rest/form-models
payload:
{"reusable":false,"newVersion":false,"comment":"","formRepresentation":{"id":2,"name":"teste","key":"teste","description":"","version":1,"lastUpdatedBy":"admin","lastUpdated":"2016-10-28T17:22:40.300+0000","formDefinition":{"name":"teste","key":"teste","fields":[{"type":"text","name":"Label","required":false,"readOnly":false,"id":"label"},{"type":"multi-line-text","name":"Label","required":false,"readOnly":false,"id":"label"},{"type":"radio-buttons","fieldType":"OptionFormField","name":"Label","required":false,"readOnly":false,"options":[{"name":"Selecione"},{"name":"Option 1"},{"name":"Option 2"},{"name":"Option 3"}],"sizeY":2,"value":"Option 1","id":"label"}],"outcomes":[]}},"formImageBase64":"data:image/png;base64,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"}

[jearles]

Activiti's HTTP 400 errors are generally pretty helpful in determining what exactly is wrong with the request - could you share that with us?

Along with that, can you provide a little bit more information - it could really help getting this on the right track:
Is this a default installation, or are the customizations surrounding this area of code in your application?

Is there a recreation scenario that causes this?

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