{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043305790",
    "entityType": "Track",
    "nonce": "0x30aece609a4d798193b35bd94a8d95edaeb6da313bb5ad2e82e66b9ddd619132",
    "signature": "0x8543f3e643bbf4eba6dce1705c688ad9b7b98e804719c5dfac8c52317e537a2e2a5732b12606bb2adf156ac1b972eeb35de3335ff0cd658be8ea4baf158c93b11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}