{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835846624",
    "entityType": "Track",
    "nonce": "1786798674311515922",
    "signature": "0xa5f69db5d436bf0721a5af974c921845a92f1cd398584fc391eee3d9b2ed756d077b96d0d38f73d1f5909281a8a4b11a1a910ba7beeacd60c91feefc66cbb9541c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}