{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xf84dd10d9379a9ae54dbac8b3f5906f32d8136595c75a384181a27c114911bf6",
    "signature": "0xe007c939ff13fa65f73c48f0442a88885897bb84eac2290ede873724fcb74866542beec313f2da5ee23d38cbc1fe35c6ef6537e2adc21a610ad6bdaf9cde445c1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}