{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xae114119a3d22c48ae406fa9d809b9507c583d414001d9d87e9793080b8f99f0",
    "signature": "0x989a3da3f280b3d7f6d8ea63963909887dd7146ca8e95937845765e4f960411f3df3b9c9df98d1b97e450bfe88397fde28f5a2d2153f79258890ccaf8e1e69e31c",
    "signer": "0x89715A6F0c23C84cE71166083899D25bE26BfBC1",
    "userId": "952196459"
  }
}