{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb19bcff19ece8694f417eeb81c2d2f99e0fd7541b50474d07752583e6ed5b3a5",
    "signature": "0xf5da7b80e59266290d7ec16a05535c9e7538902b340cd76a6a03a39111fa55624a47ae05fd9110f4165e6ae412d57a86e66e06e405b7430ba32b985dc50bd5a61b",
    "signer": "0x3ead5005602Eb50615C72e26cDaaa12DE9067067",
    "userId": "23826990"
  }
}