error -- Value is too long (limit: 512 characters)

[cddorz]

Code: the problem code -- client.agentServiceRegister(newService).
Problem:
When I used the NewService's setMeta method, the parameter's value(Map's value) will over 512 characters, and then I didn't find where I can set to solute this problem.
So I want to know how to solve this problem.