{
  "manageEntity": {
    "action": "Save",
    "entityId": "1355749914",
    "entityType": "Track",
    "nonce": "0x013fd06532b588fc8f16651cbbd8dd1d568f2dd5b0bfc5c05c4f1c062bf553a9",
    "signature": "0x8773dea9b232eda60683f5c8cf69e34d0f934b4830febf30761028c4ca3b895133e044dd38e712febb6ab87deb6bd8404359515575149a6ca6b0360d4bf68ecc1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}