{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1990bf30b8bd945a604e3fcc8367f248dbd39e408a9c8b03af41006e3b412c3e",
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    "signer": "0x407A885e58988dA0Be1611f90EEc21139696A6c0",
    "userId": "905286926"
  }
}