{
  "manageEntity": {
    "action": "Update",
    "entityId": "173028850",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieravrjyoq4ixvcg3ehputclbf7pt2w65u7g2ljmb3umtyuectabwv2q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1453686152},{\"type\":\"playlist\",\"playlist_id\":1548612219}]}}}",
    "nonce": "0xb921e0ec3101010800591e7d0f6e08c868990aa1f8e7bcd9eb5d789358a6db43",
    "signature": "0x54eb2c5c57414982c1f43d387bb6616b56d4ad5b4618d15fe3dacee17bdd18e260eb12cb382a01555e759a31cbecd4b57a2c138365ca964a523809890a8bb6411c",
    "signer": "0x5FCFd5b38744Dd2597489561951d9090bd8F3D59",
    "userId": "173028850"
  }
}