{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0b9baf41a372392da546239a61375066da0e1c3665ae51c77d46040082d31e5",
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    "signer": "0x9689e3d5AB8104ba8f965A6a5b4945644cA20FF7",
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}