{
  "manageEntity": {
    "action": "Update",
    "entityId": "522437195",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraelzp3wpkwkxfdzjgbwjvnqsfk6vsy3m7ev2ecdfagp4ea3vw5bta\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1462115017}]}}}",
    "nonce": "0xdd5d134d3995d019f75dba5f00dd0213961b2c93efdd3e8197751a279b66398a",
    "signature": "0x135b447481bc6c27569d19d771bb31e9531c3fa47c0cdfa9c7b2b16ece2ccfb70ec09853d30020f8c3d8f89daf0d9c577842cd3278e5cdb01faa45e51a2158bb1c",
    "signer": "0x9766C31400BA18128649fFb7cD1d9Df549B4C367",
    "userId": "522437195"
  }
}