{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x14a99ea384f5e87db4d36ba790dbdb88459f00427cd1d80c71d29496e2e39b58",
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    "signer": "0xfE67ae749e8cD3739D6b23E6fbD113C370b34d7C",
    "userId": "781075871"
  }
}