{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1b554fb508077fe741600bdd0121d874f34273d6becb9a3f3049873a8ed1facf",
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    "signer": "0x16F858c4A1204EFce8c84B80C23c9D10Ea2FEB17",
    "userId": "832663986"
  }
}