{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd41b5e76b17701d41417310c205ed86668fdd32f9e6674a73d4140adedf3f821",
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    "signer": "0x7D0D1f2Ef267c446EC5B8223F3a6b33B0cE7601E",
    "userId": "81709271"
  }
}