{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "994758391",
    "entityType": "User",
    "nonce": "0x76e4411b4d8d403f50c5435ad1a36a7482cfecc4e367d2c83a253e390ef56d3a",
    "signature": "0x564705f875f84b7c9e7d709dbf901f19fbbc8bae9fa59493ed484b901df228a00359582aa6cc0d2e6903ed205c0f79bcf0d68b713c30de84925d079022559e9b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}