{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2e2c9722980afbbf7378d31067cd68eb568c450fe6c3082bdba8f624b409ac4f",
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    "signer": "0x9930cFe3EDEbE0458BC7a7dE33D87aa68cfaf8E1",
    "userId": "152141710"
  }
}