{
  "manageEntity": {
    "action": "Save",
    "entityId": "619649985",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a41e5d88dab8684e889a4725e489be20f151a62368261eda186b2f4b98816a0",
    "signature": "0xd040abfd654ce0a28b3cbd87088009a13d194d520f959aa93edb596dddefcc067522cd2ba74987f84a6c54762dd3dc5c69b9d1919b0337cf36f914b6fa83719b1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}