{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ffe4ad5a36fcb6c83e133bb245ac051924fa159f5897917d51e161c118e6359",
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    "signer": "0xFfa6d5ED35Da5afB2C524d973471aD3e0d5d08e2",
    "userId": "670687777"
  }
}