{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643532828",
    "entityType": "User",
    "nonce": "0xab28b3be30bb1383821268325af21bfb357c5cbf000bbadecf9d9964593b7315",
    "signature": "0x58e891ff612e634a56f946cd4663bef94c716dcf00c0cf39bd637b9bc9226e9b6d5e3d5a8ebe0b46acfd1c20e0c52d1362f5611e5bab4e767d37358fff8977d91b",
    "signer": "0x8714181b6CC4ef4089058190cEA8db6ff1a85b62",
    "userId": "295478826"
  }
}