{
  "manageEntity": {
    "action": "Save",
    "entityId": "1560636595",
    "entityType": "Track",
    "nonce": "0xf5c000e6001ecfa846bd100155dc2c48a0f16b77d67f565ff231de770b5059e3",
    "signature": "0x24490aeb200e8d0f65952e49eae4ca283d3c05464eca2ed9a6229cc3cd693cd167c7229c32a512a90796fa1a066e6947a278fe69ca71ecebb3662288527d2c8a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}