{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x608aa57a7f4339c21fa84564484b68ccbfa447ca88eb5291e9fa09acea586429",
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    "signer": "0x3cF3403629aAD571dED750e5ea8E70E158261d07",
    "userId": "557617785"
  }
}