{
  "manageEntity": {
    "action": "Update",
    "entityId": "224019652",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa76557b1a44050f038a6ff32372c2bb0a821fe15e2ced74ba935a0b67a436089",
    "signature": "0x9a79f2c9b95fbd03f82c402dacdb95d7136b35b5ef5edf44233a6b3347fc4fbf1433aaf022f51f3a78f0869c450735742cd12d851cd89bd36b13121d71b186b51b",
    "signer": "0x7964a5eF7E9a780013d3886B40ca04443D69588D",
    "userId": "224019652"
  }
}