{
  "manageEntity": {
    "action": "Save",
    "entityId": "14531765",
    "entityType": "Track",
    "nonce": "0x4ef8b661d0fc488720b1ac49e2a9613fd2d4477a18d2d6bed570866af18be550",
    "signature": "0x047985645d767023a55c311608254976563a7ad5c03d146c0bb7bb54fc8ff4366c7b01702a1f23487b6f3dbdd7f346c83a534ec0bd80678ae1cbe48d5403bbe31b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}