{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1883256",
    "entityType": "User",
    "nonce": "0x57f593ab407ee4acf3e71c9cb90128ada1be61850794c29b91698c64ea334090",
    "signature": "0x54c386d844ab77d29205620217fc5c53305af880c52aa5af3bd26fcea0cad8e8115245d77a24105e81784a5606f5d7646d1940032aa88c777d80899f79b1575d1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}