{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3945a8658b9c1ed43de0210deeaf015be1b359811be0b24a4bbd027212d425f5",
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    "signer": "0x73BD7C4402B3cF480115A19678a393865851975e",
    "userId": "748940012"
  }
}