{
  "manageEntity": {
    "action": "Save",
    "entityId": "631046806",
    "entityType": "Track",
    "nonce": "0x4d1c98d2c6527b49e279941393f245bc7fafe364ed4a3cbcd8c541c31fa20b5c",
    "signature": "0xeb5ed9708c04d77ec42af4700f6dc15822000c376fe4a67fbc15bac1c7dd87a02b4d4f27eaf7e4fc85f2687be78e1c6f4a8a2a6b0d353fb5f4928f8539019b4a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}