Send an event message "/API/bpm/message"

Hello,

is there any solution to set the limit of characters more than 255 while sending an event message?

(POST methode "/API/bpm/message")

{ "messageName" : "myMessage" ,

"targetProcess": "processName",

"targetFlowNode": "catchMessageFlowNodeName", //Optional

"messageContent" : {

"data1" : { "value" : "aValue" //Cannot be null },  STRING TYPE IS LIMITED TO 255 CHAR!!!

},