{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x35802f9cd10edf43125f6756ce428696cf5af315fef78b3d1380f1bbfd2a5cb1",
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    "signer": "0x19eF20eFb8D1bd538C96D8ca055ebCc2B66DF3b6",
    "userId": "730331422"
  }
}