{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7d5c12564586fd9a3103d960ca68981f19af189c0dfff7d161f83e45167403f6",
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    "signer": "0xAA8A6C09eEd2da304D27b3f500A714038B12Efa0",
    "userId": "264511257"
  }
}