{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdf420c41a052f607ff9e1460ba31b963924972b27a4c0f3fc01a091078ded52e",
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    "signer": "0xFD97dAa07E9170298134EB66b9b5b688fbb87dAa",
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}