{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619242476",
    "entityType": "User",
    "nonce": "0x43d3e32fc7549b0e1970481249840c8f6d44ae8f65bb3b03302669c504b9c1ca",
    "signature": "0x2916ede3936aea6ddd9bf37b40ff1441e3620300c2d29599d1a3c0302247fd777cc381745025d89c288dda4847ba6bcac0dc096a4e3ea20aea00dca0f05a3e0d1b",
    "signer": "0x6d6397f74d01E51Fc0C654f5703B972e7CF26876",
    "userId": "237542932"
  }
}