{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "819218757",
    "entityType": "User",
    "nonce": "0x0c599fa2b2ce8048c06b9f3f12980e8bdd1a8b55fc2ea59516bbb5d05d0c23ca",
    "signature": "0xf625041e2d4d83d07e563f315382bbfbf66b545ff7c242770b31c5db2c133bed2e284853be678aca0f8bcc3b20589c7cc38f88c2b2a9d91ed69d6236eb9977cd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}