{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x06f7746b24961019ed8fd16b779068510f9670657a49f8241c401a9bdc530d00",
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    "signer": "0x37d5bFdb1c5031d4086D3D13687e3092523fAA1c",
    "userId": "623605162"
  }
}