{
  "manageEntity": {
    "action": "Save",
    "entityId": "771103",
    "entityType": "Track",
    "nonce": "0x1c5592cea55b04594cba397514551a7a417647b5f158bc881a487dd18a883ffc",
    "signature": "0x52e12458f4f0332a64c07cda69351e0814d828b7c2f47891fe6fd6ea02afae685b92c950c44f8e9937aeeea5266c21cdeff7993fa382582cfdf45c8c3da0af611c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}