{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x335d12804d2cf5bb71df8e50ada3892a8e9278dd77025a57f0b5d4043adf9392",
    "signature": "0x86c6eb49cafb53689e91e69d5c0d45c2324bbe2d8a8e6a2aee24310871b8041f2966fc834c350142ed16cbb421069962f12767322b0c0233c528df5f53efff1e1b",
    "signer": "0x5C34D43C7A4DB9967121D6CdC2b22bFAAdf301Bc",
    "userId": "916627382"
  }
}