{
  "manageEntity": {
    "action": "Save",
    "entityId": "1321329332",
    "entityType": "Track",
    "nonce": "0x929969795d415e51d6ee197e545c7130fa19298f1842b6079b6745783afd7802",
    "signature": "0x45bfa3543c51cc3ac46a943b8213c45fd0b0154e35339fae8be0a5cbf49ac7482e5730e528ea5e5c715a0f3d087c803602340188cffb6d331f650ff271d2bc751c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}