{
  "manageEntity": {
    "action": "Save",
    "entityId": "146938689",
    "entityType": "Track",
    "nonce": "0x9d41fdf7a700de418603ab1b32c75a242624a60371eaf6d8b94c961369e94231",
    "signature": "0xf858a8a86206023a3e01c7bbf180b7930481046726787d2e1275e2e35078cfa623a1280f5e8b9d5ec7868d71a8e1c9836b91b0259ee4b10537d9c4228b36349f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}