{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2e31c5ffed545b4be3f964ff1947be197679089c8216467d502dab509b119aa3",
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    "signer": "0x0CB86F83704E40b1378D3f3b931BcD1B5c8ceCA1",
    "userId": "740342642"
  }
}