{
  "manageEntity": {
    "action": "Save",
    "entityId": "781984413",
    "entityType": "Track",
    "nonce": "0x7603f3c579844c2702223e77f8b0210dd8d12e69118717ab7b79d14f04884f06",
    "signature": "0xa0e2b3171a55f87e349f8d795226208ce7e96e06024ab647cd7b9a41f61895a8579a34a8f37c53b3b4d79d8588e3408f3855a1bdcddf17807af333370de9e8f51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}