{
  "manageEntity": {
    "action": "Save",
    "entityId": "651891100",
    "entityType": "Track",
    "nonce": "0xf216edf28053a49b2dc4be0f73e7a5c515385b84a9fc49fc8db044522792fda9",
    "signature": "0xa730fafac51df91af9203dff5d86a34ad5654e3178e3c49ca0b8b767a331e362782e096422d7489c24fa805656a56415224d1b38b1663527f8250b50222e852e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}