{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaff96ded8da4056d79f69716575201a40ad5c8d3303bbc47f99d7e76204bb7c2",
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    "signer": "0x3F376de7e39D49125bfD9C68b2379c67fA79a9Aa",
    "userId": "869058817"
  }
}