{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1e987c2006374c69223e28c4c470219baa6f087f2983db0230ef2d25c6b36392",
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    "signer": "0x724f104955e3ee478470AAE7091E8d47E86253B5",
    "userId": "828152909"
  }
}