{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8740d65ad802574aea61571e3e32e5a57a9155346fdd291d18e040aa51cf2da4",
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    "signer": "0x5E915A4D9D9cb7A5693e7CFA960376B24A181Ae1",
    "userId": "864558519"
  }
}