{
  "manageEntity": {
    "action": "Update",
    "entityId": "477794851",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc0a7bbea957b05911327cec76b5275d20d1d67e974b1990fb267a577ef0d8c46",
    "signature": "0x29d991fdae34b81239c238a4b60f9516b8bcca622f5c8fe5d7c1b2505f4ee95065eb0ac22c036428aa5ac3561374e27bb362b0d58cd436c86be917e0cf655d601c",
    "signer": "0x9912C777325cc0C43bAaeC5670F65ba2c5a2b597",
    "userId": "477794851"
  }
}