{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d40bce3f64303ed8cc0fe9b3c4d220565ab850b22fee653c9837f8ac361803e",
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    "signer": "0xc7Fa9D9de4Adb976dEa68BCaDE8D5825D337ef91",
    "userId": "620440719"
  }
}