{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7a6639b30f686a7a17c1ec08efad632809c044f8886009f25f16bb9d187a8660",
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    "signer": "0x4f23AA5962952Aaa54c61cAd319F3Be680F92916",
    "userId": "482758325"
  }
}