{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620379449",
    "entityType": "User",
    "nonce": "0x1b2607e964707d414274ef044efd8e3b3ca4f4147469768b62140d52fbf879fd",
    "signature": "0x439d46fe562da45c0b62b7952352041a20f97f040cacd127e831e39d488fd597621a62585c61659a8266025af3aa0ae7d43753fbd3a10f89159430c3b5e28be51b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}