{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d901cea27182424ac670c8d927610ef564ea0ff5caa92f54fc60e334b523e30",
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    "signer": "0xfDB135c6576F4c2f11DAb7Fc81d12eB18c594598",
    "userId": "750592366"
  }
}