{
  "manageEntity": {
    "action": "Save",
    "entityId": "228348",
    "entityType": "Track",
    "nonce": "0x32a269b2d18b67d5fb66bbb8992b1640a0ab7ef1aaab5dbd4ab510ce9dc8431f",
    "signature": "0xfa0f3b845089d371996837057f32bf0e9afcad5908d040c75ceecfce790e3b8e4ea07a18d76ad15e8c1d42e8065697ee3304319e4cbb23c88504db938084e9d41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}