{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4e04f0bd95e07e7fa80895dfdd5e293d9d1f1476e2a1e91a90ce06feb101a5aa",
    "signature": "0xc730663fc3e70f217db6d7f863ccaa5a447e418e0d012f16c20a8761706621be5d11dc5fc489889bb27bfeb18b870214ac73aa6556f0c853c81ebeb0c8be8cdf1c",
    "signer": "0x789076e58dC57d76E5BA6543f843b7b769a3b0b2",
    "userId": "279102342"
  }
}