{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x63b6642c975cff1a948b91f9c94334e545ba45cba3b0bf325a8ddf5ed1566e3e",
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    "signer": "0x19166AE09d463E514b0aB409C88EEC06449e0Fe2",
    "userId": "556008552"
  }
}