{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeb199ab229f04b0faa9b727122898498454b40c444ee7defaa61e3c1ecfb09ee",
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    "signer": "0x2d956609Cbe7D7e504Bd6319d4abC4E35de2dcF3",
    "userId": "663406710"
  }
}