{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "755516",
    "entityType": "User",
    "nonce": "0x29fad64a5fd6ffd0ff690fda6a94e13fe2b01b770658a38eaf01eef0c9c0d26c",
    "signature": "0xc20973d27b27dea6583ff22fc5f6b73fa76745f7e263daf7bd8001182259723b1a7224d2445aed9a64cd3a1b5c0e4476346b421d46d174580fec35937dcba52d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}