Scala Play Json JSResultException Validation Error -


i trying pass json string other method error,

play.api.libs.json.jsresultexception: jsresultexception(errors:list((,list(validationerror(error.expected.jsstring,wrappedarray())))))

i find strange occurs randomly, don't exception , do. ideas?

here json looks 

val string = {   "first_name" : {     "type" : "string",     "value" : "john"   },   "id" : {     "type" : "string",     "value" : "123456789"   },   "last_name" : {     "type" : "string",     "value" : "smith"   } }

i read 

(string \ "first_name").as[string]

(string \ "first_name") gives jsvalue not jsstring as[string] not work.

but if need first name value can 

val firstname = ((json \ "first_name") \ "value").as[string]

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