{
  "manageEntity": {
    "action": "Save",
    "entityId": "1837929443",
    "entityType": "Track",
    "nonce": "0xf4216f6b402115ff6c79b957db77eba33965a1960e0741a928680156fcec6561",
    "signature": "0x6dc696bf12c397805772a2bb9f86e99e24d1bd108a23c2cff32ccb55bd4c4a346361d9ebc8edac9df793d53858d11020f5b84c53f7937abda3b50166e422f0fa1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}