{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640998557",
    "entityType": "User",
    "nonce": "0xb9c81754c3c93b941aac0a672a35f9a7d10e05be62004149fcd498cb3acaf81d",
    "signature": "0x3a266f054786e2907cd40b3280670e4ace159ee9a7a36805f63a179d2a7d384279056f656ed1baeda737da05fed6d27f1540edcace30f3ca8e2e53137a2b3b2f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}