{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0db1841e20c88210f6739cdc88473d4a8085179c697361a7810e40bc4759a332",
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    "signer": "0x91bbADbc658270eC1a940AFa278dE21b9cE60a1C",
    "userId": "867801987"
  }
}