{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf7b4b3b94146c4d7ea8cc20e04d26582ebaf3d399ad68ce7907855f7093fd48c",
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    "signer": "0x0b521e9027B04852585F9386a5517A5ED75a7235",
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}