{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x9537963319ab562ae5ac011b137d58bb93181ccd290319c4464edaee9c17385f",
    "signature": "0x15f9c7457a2d09a8d45c42e7f1037a3b6335850f0f486796fee05b3cc2347aed55414ce10bf012b653ad176955e17ff807db28e1f7625d560209cb8615e3bd2b1b",
    "signer": "0xE99B6771100D63894452ae6eE05837583c2de6d5",
    "userId": "883691386"
  }
}