{
  "manageEntity": {
    "action": "Save",
    "entityId": "342881905",
    "entityType": "Track",
    "nonce": "0x573a0bf09eee9db5a96a0bb4165ef20262e15fdf059c1949a12f8163619effec",
    "signature": "0x636696b0442663d81aa6c3e669abc05d8ebbef062a62aa6991aaa08d5ccdc0c03a0e4c0e87abda124317ec528877825d41ad0ed7535e5a518dc9d69be92895d11b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}