{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8974b945e01e901f511abeaee0c8ede2c7e8d373ea5fb010c450d51a01b989a",
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    "signer": "0xe7F103EC179949d67328bEBb7E5BF32D7B17c793",
    "userId": "718082541"
  }
}