{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x25a47962163951622204f5fd57b724f533bd473a8f564f029ce48751253f92f7",
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    "signer": "0xAA23121a7f0A35e37A00c90737535F3743a08AE8",
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}