{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xb0d67bbe645913f48e954924ccd680ac960ab66765f08e0bf5b914e66faa121f",
    "signature": "0x4bc1cf5bc8d394ffa6ec737b07feca6f84605f9a2c4444eb8eaec2f3f54ea63414298c6c89a97ac7d919b82c8259211f9f8679f37cc9041166b86bb29c9a3fa31c",
    "signer": "0x0E1419Aff1544Dde5c4eebbCfA208Df83ACdE40A",
    "userId": "564626302"
  }
}