{
  "manageEntity": {
    "action": "Save",
    "entityId": "944022326",
    "entityType": "Track",
    "nonce": "0x0b29fc9ff76dcd56c3b77972f499a497b7d68236e353bcd70688b6638bceae8e",
    "signature": "0x66b12a744b77ca15d86522f7eb2c16c6ebc41addf8f1c7179f6e477d1d634a7b5b12217fc751d8e42b2d625c35b93df21894216ecba07625d50c4c983f853d661b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}