{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x567908ee22508c4db9b1ce4a5c32d50f915b35428704ded6fcf6e39f19bb4b71",
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    "signer": "0x785343dcc008938B9B79e332EF016228A546dB33",
    "userId": "383560128"
  }
}