{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "564208727",
    "entityType": "Event",
    "nonce": "0x4e623f8e808762c6ce19010cff8b256c8c20f5e4b02855faccc205f2107de071",
    "signature": "0x1541a068a8f9d7edbcebe203d577e676ff88e2f12fe81cf8d74fa8b7bc98b13d31541afbdc7203108ba454b685f44272811394797690635861f4f2a32dfb692d1c",
    "signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
    "userId": "599751364"
  }
}