{
  "manageEntity": {
    "action": "Save",
    "entityId": "2108463536",
    "entityType": "Track",
    "nonce": "1791866111620161734",
    "signature": "0xdea7e94f81daca1b7992c39843eb3fe0d4729f214ab7ae1c14dfd8e72fe08c0c3397975824a545012014b15f7f5959a22c21b13a54d58604a4ad6768629b22e51c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}