{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x599d0ba09b228724553fd89044677def23146a3609754ce72648993b039cdde4",
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    "signer": "0x4fCF26571935c240F182d98b6630B5D3CeBC9d7B",
    "userId": "605939603"
  }
}