{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x56684f39f63f39825e8febff13042ddd7e2dd2f18891c0c7bca4045587e3b777",
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    "signer": "0x1a659924AFe35D1F9BACF9f6b09B127487A3fA6b",
    "userId": "24244424"
  }
}