{
  "manageEntity": {
    "action": "Save",
    "entityId": "677682261",
    "entityType": "Track",
    "nonce": "0x7d36cdad347a5061204d963c90bdcdb291f5c61a0a14ce13d30459df6efe4c3d",
    "signature": "0xb28431b143fc87f802a8ea56cdfb6fab1ef7895ad3249890a0bf60096e2fa5b67043a75be234b8f10caa798fd21421144f7e601d96a15fda93df3b471db5b8521b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}