{
  "manageEntity": {
    "action": "Save",
    "entityId": "172771683",
    "entityType": "Track",
    "nonce": "0x962de3993bed797ddddd5056d194aa917d5a386e46fa236e2e9291b99cd8229d",
    "signature": "0x449ebc09bea88cd8be39b3261d52e58df3e30f8d9c0cc80f4338b4aaeeda0b44539092e908c2110757721ea0a9eec521772f95647658a7015853727b87ea9e8e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}