{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124472706",
    "entityType": "Track",
    "nonce": "0xc543601cb6a7673dfc2a0b734e0f27296459b2995a178f8b4196d163b624e3e1",
    "signature": "0x2897cccd30cbeb2a2b8accdc12793c6f50b4d1aeb9f7f86e6c4c3053d6f8639667ad44a65266ba94f4e3deccfce4e009cc3e6f256444bbbddacb47b1d3cd72761b",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "2047015"
  }
}