{
  "manageEntity": {
    "action": "Save",
    "entityId": "384299055",
    "entityType": "Track",
    "nonce": "1792380721421030722",
    "signature": "0x8b567a3f83ffbc532e3719e94f6b09c22013200432fac823dcb4855c6f0b08c4005163b1a84bb0fa2a39959de44925cb79025550ba542e2c4da2181eb8fa97561b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}