{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1e5a07040ebed458cb9504f18027f30b4f5ff6890040f57be936fad1d64230ec",
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    "signer": "0xF4db4fF39b6fB21ef8aF5Ca071b39276335a5f46",
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}