{
  "manageEntity": {
    "action": "Save",
    "entityId": "1427290245",
    "entityType": "Track",
    "nonce": "0x9e470643ac64b5f6782560043bc52bfcde803dea31d0adbabe934f6fd8690467",
    "signature": "0x9748d78a46cc39e33ae218cc0987ca602407e6e16aa910555a26afcc68216b4f4844fcaeda476b5cdaa3ac028ea31d51f55366f665bebe0f01c0291d1c51b8101c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}