{
  "manageEntity": {
    "action": "Save",
    "entityId": "718610678",
    "entityType": "Track",
    "nonce": "0x86e0ed774a9012a4a488fffc5fbeb772d1b066f78c8e178a95e959de57326276",
    "signature": "0x022a7074502dd1ce9628ed3e7bb58c128c367f30df4bd52ccaf73bcc6f9c6e8025c11a46df2cbbeab7665a328ce526812bcfd6e6dacd66a7c8eb4bdf5c6b886c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}