{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d40ef69373f9bfa423270eb3aa7d21675ad845cd1ac56521f7dc8eb4bd118ac",
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    "signer": "0x8f0Aa8630bdC846D6a2eB06f6b4b21f508E95D29",
    "userId": "30179440"
  }
}