{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x544501ec28aaadca93084ef1552faefbfedca36e9f1762a8d8afade1b1ff3e4b",
    "signature": "0x28eaa44e0fc4a5fe108a40ab5403ce3b0d1549c2fefca224aa43584ca993562f53f55e80cd37630339ea873ca0a61a37403eeb1c2a28b9119d0d612e10e4cf541c",
    "signer": "0x53Bfa6037a424C63e5001E895A2a53F7355C0c14",
    "userId": "145030908"
  }
}