{
  "manageEntity": {
    "action": "Save",
    "entityId": "2104328298",
    "entityType": "Track",
    "nonce": "0x8c16441210541fbd9b594706dda82f31576dd9e0fa2cac33082f279255670a4a",
    "signature": "0x36a42ce00653b0e8992bd4ca732197b5c53f214853de3075f9fc29321d265b0f7898d5d646054c9f84f0f0413a469b348d35b106c9cf439841e9135216c1ddbe1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}