{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "784638380",
    "entityType": "User",
    "nonce": "0x9a80423d4a7d0ecafd99403acb068f5bde252158fe7f268d6b52ad2de9a6f90d",
    "signature": "0x5a8cf55d3cdd5b80c825d3ce72b83778fabdf74d794338413c4f3c10a720db9438c471e66bcc814c9e2a47879a10307bd096a4d9feef6d1d936e0fcf72211e831c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}