{
  "manageEntity": {
    "action": "Save",
    "entityId": "330732317",
    "entityType": "Track",
    "nonce": "0xc5a3db178bf22e3c91f8b3e7c6bb8512f359094f5361ec2a85e7a4c3c3d3d903",
    "signature": "0xbb690fdf92821922509d121471e08f057c4d649e553ecf2624f12900d95d68ca0d5c847aebd4762acfb2219c670aebf5950e2157eaf160ed158f3b12da6e06011c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}