{
  "manageEntity": {
    "action": "Save",
    "entityId": "1334499533",
    "entityType": "Track",
    "nonce": "0x96954cc003f77616d4def6119e24c36f8b3d8e3c1681ae413c7b569217d0986e",
    "signature": "0xbaa8c805ca80d03111a3d6cbb556da763a25418d26b01b450e3db1169564422b4762d6630288409e2800c83950fffa7b0537613884d29d1c2c2e3d0af580e82b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}