{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd00b34db76761e96f6f59b281111bc078cf18b2461e92daa08a158803daf6350",
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    "signer": "0xC2846E096A889428a0dEf578e09ebE9468cDd43d",
    "userId": "175876257"
  }
}