{
  "manageEntity": {
    "action": "Save",
    "entityId": "80888",
    "entityType": "Track",
    "nonce": "0x9ec1177bd3d45741ccf709fcd068da753ea2a58e7c1e91169b025de7e3d9135f",
    "signature": "0x2a31c8a12e9a13fbdad6545257245e67f2cc02f0a344a9d075957e8eaa4218ad7b9c8e565efe67f9db03b608c5a0604e1c65e853d2bd5f32f500a689681e06f01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}