{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "616809",
    "entityType": "User",
    "nonce": "0x0ec9e8f5d44a38db57eed8b850e8b1d6920ebde884ec61e7d7267c6a011ab305",
    "signature": "0x2f0ac62749c5ad0a5344d6495fe4dc4f2ebf69fe89c143e22db76c7d7829b24842955f9ffbf52f374aca4b6adef565be9637d5ca7543b69a1595200f0c2a1d4a1b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}