{
  "manageEntity": {
    "action": "Save",
    "entityId": "760148797",
    "entityType": "Track",
    "nonce": "0x8fed2ce319c6c5df5b167bae462976dd625e371daaa5372019ee89f2040b8082",
    "signature": "0x56b8c0e0c940c6f07f1c2d1ccd871f2e8f16fce4b46e07d8470b357acb697eed5824a02b845c866ebacf5a9e12e32fdf6bffab61bc34a906611c7e7df58fbf341c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}