{
  "manageEntity": {
    "action": "Save",
    "entityId": "785781173",
    "entityType": "Track",
    "nonce": "0x96376a05477e69674bfab003dd89d0100a8e60dd4b6aa5eb9e2e05b57ccb7c5d",
    "signature": "0x849aa03ed4e8bb73eda6b3da301baa176bb9527306fa33de7a86b2343d42784f625b12b64f8033ae5f4c59eee9aa19899acaf60244d4bf456d2ab1535d7632fe1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}