{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4546c9818c2372cdf6e576c8d10214783a84c41e6af69c7b1cd0cadc0e157d91",
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    "signer": "0xEfA957B0Ff6363b07183bb874f15CE1D53814497",
    "userId": "390537926"
  }
}