{
  "manageEntity": {
    "action": "Save",
    "entityId": "923828",
    "entityType": "Track",
    "nonce": "0x1ca922af4008da6a8437dde7cf61482b6d51c0fa4aeba056c57076499b99c374",
    "signature": "0x93045a1056f31c629ad9d80ba6e6a365f5d62d993d490b6c42b5c90a4432149905233b464d7d3450fa69d4df4e39d3f1ee83d840d7bf038ba7679fdef0c467e51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}