{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6cd273daa16d2c627e77263796c23164b95df778c12cff63a76b3cfbedc2126f",
    "signature": "0xc1cdd3069a9f009eb0608dcbcec9c76f71851bc27e3d669ce30923149e31f16c4f8f9b6fc864f717e7930cba9e43f0e4c61ad39abb627c4a1a60dd9392b35d1a1b",
    "signer": "0x856ef0FdEe1Ae5e43a026F00e4Df68eAc6Edef55",
    "userId": "300092437"
  }
}