{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x351d9c7409fd53a41843d347fff3491945f01acec2df8120d7316116f2f568f6",
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    "signer": "0x943e3034Fc47B278c77A0D8bF6d68320A1b0481e",
    "userId": "65913693"
  }
}