{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x632830c9be058270c3c7f1c3a46dc505acbce453d5ea3822c278f9d31374dde2",
    "signature": "0xe75dcfd81bf03d405f2c63f9e5c9f9cef899d05e7b909f73319b16268cb6d10d1b9bda6c57a267c4765db28848aa8a5f36cd55bd5f455fac003506f799f347d31c",
    "signer": "0x82825942955ce5712c1c89b3e5fD8193a6dB5170",
    "userId": "489137111"
  }
}