{
  "manageEntity": {
    "action": "Save",
    "entityId": "1157255597",
    "entityType": "Track",
    "nonce": "0x0a74880623e30114e25b979367e425628a8fa4232c384d1bc2173f92277d2ce2",
    "signature": "0xd3c9303be3218110c849a1029f34edebd78d92cf41e07087003c48f33566812561a2ccb7aeb160373a64e5aa069a209a3eadcb6bef3e67c21027154c13a4ebd61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}