{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x931c1290d96d84abf80fab17e1435501a646733c6b5c8c6995762f84dddbaa21",
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    "signer": "0x013De08bFBFc517Cb235Ec209BdC6444510C6E82",
    "userId": "128358122"
  }
}