{
  "manageEntity": {
    "action": "Update",
    "entityId": "505182311",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xde051b87140da3f6e5493d698565e318da3258ea42718d8ad5043882f71873b4",
    "signature": "0x338d534d115221a7e96b801f9706a51337736714b061fdafd2d0b660839eb8d419c46d263db138d843069aeeb16f0aa095a2858cf5ff95bb414752566187b9211b",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}