{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x573777203cfd4a7b28539e58e1588ef138322707c61464f2e0b0a39fd82150e7",
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    "signer": "0xEd4A4410f51c0eE813c67f77160d10FC7dAe0EFa",
    "userId": "723008316"
  }
}