{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "564312400",
    "entityType": "User",
    "nonce": "0x15c717aaeb55559e83548e9131fb925aeed6d5a635c483943286a3154bcd50a2",
    "signature": "0xcb6e5412a38e3d5cfa2b20ab2ce714c29c369a19b61c5d5de96bdc47d9fd7d8b01255362972bbc154b567e65b7b8e4d9ea3f66e707e183f85f44733d108379821c",
    "signer": "0x2ABe6644EecC756F620e6AE9bf1cc07fDc013121",
    "userId": "925633464"
  }
}