If I correctly understand your issue, the solution is to add the %%EXTRAHTML%% token to your creative format template. See https://documentation.sas.com/doc/en/iapcdc/1.0/iapug/tokens-predefined.htm Without the token, the snippet is appended to the end of creative which corrupts the JSON. When the token is present, the snippet is inserted correctly. See https://optimics-ads.aimatch.com/optimics/bserverj/ball/site=test/area=def/size=exmample-json/afmt=json-snippet which is using this template: {"creativeCode":"%%X_CODE%%","snippet":"%%EXTRAHTML%%"} Vs. https://optimics-ads.aimatch.com/optimics/bserverj/ball/site=test/area=def/size=exmample-json/afmt=json which is using this template: {"creativeCode":"%%X_CODE%%"}
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