{
  "manageEntity": {
    "action": "Save",
    "entityId": "544444197",
    "entityType": "Track",
    "nonce": "0x4c12d898282a7f144263aaee05826a8477f9b130642d408b287ba6cb12e65e95",
    "signature": "0x323c178912f2e48634e3ebcbf6eb1a9952b6e8a149dbbdf06128b591b028d270748241b9213040d04cc7c3813a26959dac3060928eb57fab4f15028b3bfa91e31b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}