{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c94288241087f390b7b2a66daf8810741140ecc591b6b614016afe5e5264962",
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    "signer": "0x821Ba9D70911c7bCbef78c7Ef024d859557b341f",
    "userId": "589767899"
  }
}