{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcf7c29d065410c54124bf5e139f42bb42f67b847c0da4e894fdcff57c06ec732",
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    "signer": "0x251f4316d79a4a2C37293F9335Fc2007700Be97f",
    "userId": "59773771"
  }
}