{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x302edf10bda13cf61cdf02876e73dfb378ba5177cf2792e63877887e1c57bdb1",
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    "signer": "0xf797f02D186eBb3D55DE736700BBEF00e8fCcEEb",
    "userId": "512650949"
  }
}