{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7353a58d8988c29cd4f4001a79ae2cf8bedb0d214df8658ea61b12c81fa6804a",
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    "signer": "0x7af46D076Dfc4AeEc0Fd675DA8515B4E90149C52",
    "userId": "130211804"
  }
}