{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x645b8939b15d5423fa7369ee6a2a83684ba30d979b91041f9d151bca4bfd0c65",
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    "signer": "0xdbA357EFDfe46052De520AB4d7273f64e33BEAb1",
    "userId": "609391289"
  }
}