{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041381",
    "entityType": "Track",
    "nonce": "0x66d9a4b362712e9de6d8f8ee2cdf0a2a81891feb2b65ec4272b6d5079b36271e",
    "signature": "0x087cc17851ef089e84a2ccb5c947f240d75f43a72864e8e1c481f46cede122005000f8fa223dc27a25d94f16222845d27730d65b45f0c48059006c95042e22b21c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}