{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "73670",
    "entityType": "User",
    "nonce": "0x509e002e3b2d7ee2755254d3cc39aec04b6232e3f7dab0f60a843767c02ae149",
    "signature": "0x2d2f1876ee714f883a342f4a18eca12c85626582e8d3ce1a5950ce7fd4c8af253b543625b595c856e93e5e389aa61598d0d0ebb56afc5328889dd2fac3f4468d1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}