{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf1a6e82ae2ee28deb194115d476f870be934ab7b6f8256b0eed63b728a4a52e1",
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    "signer": "0x77833562adb5B57b0187a2950632792e49FC9700",
    "userId": "630757315"
  }
}