{
  "manageEntity": {
    "action": "Save",
    "entityId": "661994039",
    "entityType": "Track",
    "nonce": "1785354354668638607",
    "signature": "0x497205f98e834a3be26f3fe3232f2ab5edb2d73de3c69fe4df6d8ea400b9cef15ac34da92ecbd340b7ceea4b22fe39ac77c501f4206e45b40ab4e6cb68d1e4721c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}