{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216649403",
    "entityType": "Track",
    "nonce": "0xa7948477bfab52f5866eba3beca998759b6844ddc5bbf2c82b6c80c7d2e0ef03",
    "signature": "0x069132f6b55c13edb257f567a86454da7b868fa885e9840d1f0395f8efed1cfb581e1bc60d0b52427a8b01c3633fda92734a645182cb03241f33f6491ca4f52d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}