{
  "manageEntity": {
    "action": "Update",
    "entityId": "456087321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajopzcud4mctalbfvhelhsl2wxxwj5xzu7kcabjolx2bqcmjqjbuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1053100257}]}}}",
    "nonce": "0xca7645b362abf32053140b91d0a8604798892a3f5256051b2505fa946147cdd1",
    "signature": "0x15842cf186fdf248c522494d1fecb501d36b6d2af446c2d29f471e1b11c665ca3173340af906227375539c7c1c02c37497ab544cd58a327a19da2530f317bb141c",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}