{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f55fb2c7586b1d5a5802a48e0080bfdc011dc0489322f6729beeb45d39fd717",
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    "signer": "0x12F25F58Cb34d6df58d2e1E6f81153193f1da01c",
    "userId": "262120414"
  }
}