{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xacaa384525236b7373e860206798b1e4b1e138dc89727c178d3b01820d5b5e31",
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    "signer": "0x1A99bcEb1277f1d90Ffa77B2c480Ca93a4a4ebC4",
    "userId": "852344394"
  }
}