{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d0f282d46ff9856fccd20ed302d418dd9b8faef349837579b5acdd98f2cc265",
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    "signer": "0xe63C524283Bc750397fa749AF4E45e97f4381dF7",
    "userId": "783369371"
  }
}