{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2f9b3528575c78613fbfb783c31ea8824ffe6bad6561394322dbad49cc22cc16",
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    "signer": "0xEe161b4a841AAb3460dEa48e7E9d0DF4517b18bF",
    "userId": "603553289"
  }
}