{
  "manageEntity": {
    "action": "Save",
    "entityId": "1158093859",
    "entityType": "Track",
    "nonce": "0x6f429744fbccba005279132a6de774cab6af78165448b8e55caa94dcf2bfd3b2",
    "signature": "0x8d55e5c446132cb38641061610b93e52a3f0a11230dbdda8384ecfd27d6b0631356eee4753a5c5bfe830050057fc0a86a97f8912f758c775fa6c053a2c597e471b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}