{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530736971",
    "entityType": "Track",
    "nonce": "0x925a7261bb2ae4ff1c80da2600a5bdd62d3e3b19d0b136283ca763c786530934",
    "signature": "0x33e321a036304160b3e9a2bd0d578ca6177b6fc85cac54fdc7dae4aa14bfc8862d47e9517525bec6871d22965d187bccbf30a295011087468dd10b13e93cdb401c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}