{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x40caa7e89723a1acdd33ab65674ccc07956738d992c500a1ec5aa8182d79ee63",
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    "signer": "0x1470A6BA5FC33720594092A39863a8efa306D07a",
    "userId": "968378094"
  }
}