{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969078536",
    "entityType": "Track",
    "nonce": "0x7c633400e0689dc7a857995a48a5387bf668421aba628619967df8b7c54bc68b",
    "signature": "0x9b26d7f32242f0377d0adc07ca8899e4c343a7012034fdfde007e57985eb941e321115e4930ba8a875a419e6f430576b5ea10781555fb3c75df00afa166fbf201b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}