Apple Pay and Authorize.net Token Submit Fails - authorize.net

Question

I am working on getting Apple Pay integrated in my app through Cordova (Phonegap) and have successfully retrieved my Apple Pay token. I followed all the instructions outlined in both Apple Pay and ADN documentation. Generated all required keys and certificates (twice). I already have a working ADN integration using both CIM and AIM, so I know my integration is solid. I can process regular auth-capture transactions no problem.
I am working in the ADN sandbox and have tried switching my account between Live and Test, as well as switching test mode between True and False.
Here is the information I generated just now (redacted and truncated):
Apple Pay Token
eyJ2ZXJz.....2dKdWs9In19
Base 64 Decoded Apple Pay Token
{ "data" : "PtFJv.....UNFGg==",
"header" : { "ephemeralPublicKey" : "MFkwEw.....Baor01w==",
"publicKeyHash" : "Q1q.....Juk=",
"transactionId" : "c51.....b4"
},
"signature" : "MIAG.....AAAA",
"version" : "EC_v1"
}
ADN Request
<?xml version="1.0" encoding="UTF-8"?>
<createTransactionRequest xmlns="AnetApi/xml/v1/schema/AnetApiSchema.xsd">
<merchantAuthentication>
<name>REDACTED</name>
<transactionKey>REDACTED</transactionKey>
</merchantAuthentication>
<refId>C.....4</refId>
<transactionRequest>
<transactionType>authCaptureTransaction</transactionType>
<amount>5</amount>
<payment>
<opaqueData>
<dataDescriptor>COMMON.APPLE.INAPP.PAYMENT</dataDescriptor>
<dataValue>eyJ2ZX.....9In19</dataValue>
</opaqueData>
</payment>
</transactionRequest>
</createTransactionRequest>
ADN Response
<?xml version="1.0" encoding="UTF-8"?>
<createTransactionResponse xmlns="AnetApi/xml/v1/schema/AnetApiSchema.xsd" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<refId>CID2254674</refId>
<messages>
<resultCode>Error</resultCode>
<message>
<code>E00027</code>
<text>The transaction was unsuccessful.</text>
</message>
</messages>
<transactionResponse>
<responseCode>3</responseCode>
<authCode />
<avsResultCode>P</avsResultCode>
<cvvResultCode />
<cavvResultCode />
<transId>0</transId>
<refTransID />
<transHash>2E.....B72</transHash>
<testRequest>0</testRequest>
<accountNumber />
<accountType />
<errors>
<error>
<errorCode>153</errorCode>
<errorText>There was an error processing the payment data.</errorText>
</error>
</errors>
</transactionResponse>
</createTransactionResponse>
Needless to say, this error response is less than helpful. ANY help would be greatly appreciated. Also posted to ADN community forums.