{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x059bd6dffb8deb491a75a67e88d1be2c2899923e9250df72833321fae0fdb28f",
    "signature": "0xbe729da89862e491fabf25163dacdb97414c6470474b939027b6236c17d2261b31e02c5455f239e9339eab1c6c072d0972a446c9c977b0eae2780c7df839c37a1c",
    "signer": "0x198BF1D951031af86d9F9C2d9Eb2b929fE59D7d6",
    "userId": "608204608"
  }
}