{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "774557384",
    "entityType": "User",
    "nonce": "0xa1c9fc68888afa5c42004ec77119f630d3da84f79fbd07802a999249efd81b2f",
    "signature": "0xd3728f537c017dd05d90eebdf1c4d0fa41f9418439fc9bd16c2861520fa4307619c6bfa2ca599413a81d869b87f566e27496be296e3bd83d02cca601cb97a92f1b",
    "signer": "0x9f5896C078219d89B9A5D8B9C381b7be8BEf4CFA",
    "userId": "56704236"
  }
}