{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c5fd05eb068e4c569461e9c93df6b537ce3333abe207049ec496b4012b28bbe",
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    "signer": "0xd8414d8134902279e97471e479cC660e0b98a827",
    "userId": "33402495"
  }
}