{
  "manageEntity": {
    "action": "Update",
    "entityId": "854973001",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3b4591f7a12b7bde48faa7ba7757d7e673891a8c666a7671386d7b8b5b21e64c",
    "signature": "0xfe5205755f86a87e6acc6c4c45d829fb3e53715e416262113fb7da4b1748431b36f53441e7f594fb364fc13f0c840cb6633e967d13760dde253434fd04ae7e791c",
    "signer": "0xDB1529DAEb2cB5c0C5d2dEA55094A5c58c08df37",
    "userId": "854973001"
  }
}