{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00f45a1d277de8dc0192527f19474acf5c658c8275b3da95d4cb2afb51fdeec4",
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    "signer": "0x6E1E443008E46412225A18E5CE617CaE26954800",
    "userId": "473283799"
  }
}