{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x37ddd4c05c4abae7de13abfe2f0ac2588de856611c61a96a019cbea050a282d3",
    "signature": "0xa5427b783b8fda82c27c647cb9ba620ebace64750e85181215f72dee31ae34c210bf59e6feeecda2517c3e08dd51ea947dc6395ad8ef19cca01088b941057dee1c",
    "signer": "0x53338fEc8A623db3e64Da05376c83Ea59Ea5Afd2",
    "userId": "587486248"
  }
}