{
  "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": "0x70cb0ecc06314227d43ed07d0061e6bb45e4b09ea8788243acf29f2b6fca6426",
    "signature": "0x39e4154cb4840b6993b3f89e04106b29ac58e50ea18738ad2fed54eede14b3385cb0d0d822ee7a159752a9c4fb5a7a099980cac011f7e6bdf7b573f8296ca3631b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}