{
  "manageEntity": {
    "action": "Update",
    "entityId": "449044166",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieralmdkrthz5vlyvqto4jvblpjdqde2n6vessmrahhlctvfz4bxfzqq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":97465}]}}}",
    "nonce": "0x48e56fa56e8fb5a1dc5c3e7d8f63113d74b1c3a1b6022fd1c473c4f92ade5034",
    "signature": "0x1fc51be3327fc20b67efa60641ba29a3266124c9e24eb63de081b7d49fca896448d370432e1219d6742ae3374359f6b2d78bb2242b2ac178805fa47d53714d0f1c",
    "signer": "0x6f04C187ccb2ebe59052a3167b693fB276d7cD70",
    "userId": "449044166"
  }
}