{
  "manageEntity": {
    "action": "Save",
    "entityId": "684754957",
    "entityType": "Track",
    "nonce": "0x2bf05b96971ed4b5b88bcf9d23d4e984270a4d9e90d192bd54842609f5d20678",
    "signature": "0xa93f71c18e3bc4626e897c4079aab40b334fa5a837fcc81dd044be4e709bad696a2f565b12de7d6f830c52dc8a3690558c4767f45c19a6e41e8e8d420d600a061b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}