{
  "manageEntity": {
    "action": "Update",
    "entityId": "301719964",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd18a9da4cff53aaa7028334be48fdc120cd8f580a091086def162167370c6018",
    "signature": "0xb225568cb721e95faa3b16d282caa25135f8c0b068c0cc619f016aab3316cbf16433909c75460d4bbe88e81c32154b34be55691e7fae3d58f18ad558d49681b91b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}