{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020748734",
    "entityType": "Track",
    "nonce": "0xcbb6f6bd189502d0e6074bfc09e559b02496f5b433b92215d5c4a1d2fdc643a8",
    "signature": "0x2944ab3bae0b318fd01cacfea221cef04f48b3260b5b858b65e2b15dc9d798011c51685377c13dd10cc123200f96616540bf73eb057f9719f6411d93172789541b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}