{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x35da0e25851aca7c5c8f062b679c3f794f047f6008162cbabe4abefff9f4b9f6",
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    "signer": "0x9695B57A39165c520230e4E139d463488b1bA4F4",
    "userId": "595472703"
  }
}