{
  "manageEntity": {
    "action": "Save",
    "entityId": "48796144",
    "entityType": "Track",
    "nonce": "0xeb55de4c23d2e9d901bb5d22a2625cbfb0ffb353478019cd0b75b96cf87028e2",
    "signature": "0xe8f7bcd3ebb2bec673e134883499a0cda8fda1ec060b448edd3a01629736034642f3339aae402e85e4df76f8e017c0f0d993919f5fcd89cc2b7ff880ca1198b31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}