{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x55cebe65f5d812c7bff99e719456d5366ed3db61d565a4f38e5a6db6cc0a07dc",
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    "signer": "0x5C1f6fabc4752148231aC080F5Daa085c2Ba2Ab2",
    "userId": "413378711"
  }
}