{
  "manageEntity": {
    "action": "Save",
    "entityId": "223630782",
    "entityType": "Track",
    "nonce": "0x83fcb3faae63e39cfeed5ebcd971093d61c4844657c9ebfeb0582625b804d151",
    "signature": "0xc7c80f0396d3dd078551f161e2a7e6a69708c30c8efb05182dc9e34fb347002e0f02bf321b8f469683696b26b63ecb0d254f93ca2c8de5e3d473a115cd6b36c41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}