{
  "manageEntity": {
    "action": "Save",
    "entityId": "74841",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd47f9f9d4625d8cc49e49a6c0f4ad21199a990d5c0a61c9a4cd9e9b69a049a21",
    "signature": "0xd3537ad4580ac2b5d4ea120b5265e4c12849f2791347e12d02839440f81478b93a1b6f4a8da60ea8fc09e489e4506a591af5e2c9512cc14350fcb6858b0702501b",
    "signer": "0xFa074f848Ca977aCBc270CBbfd4c375c210eB1cA",
    "userId": "939103135"
  }
}