{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5fc16512b18de81c1983d40fe1cf05d75c95e41af5dfb061fba5e9eab56c2563",
    "signature": "0xa2b4876a99da0bad00534370622842dbf094baf064a1bc30a3d6b0bf7c5794530a1d9d283e260bc42e23145b255bffb91f04bb30ee823b7725488e97469148481c",
    "signer": "0x674FFC02F71bdD4bD3Ae60c618579EBDD541E397",
    "userId": "787787230"
  }
}