{
  "manageEntity": {
    "action": "Update",
    "entityId": "300398894",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x76f860d5a18e56e24b2d37ea71fb1e251dc1a7302eebf1355d071593c2dc0c57",
    "signature": "0x4e9beb46cb1a776da2bbfa3444385041f7d884f784c6988c492469042e49efe021919a8e119b27b63d5f9ae4886e287c6e9caa82d887fae9a7e3f0bd3ca93eb61b",
    "signer": "0xdE77ab6ecdF00f63939F775B1F46d8F0D7A53AB7",
    "userId": "300398894"
  }
}