{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x5dcae0d84f52e07e38e2f104653610338c29e9d33dcacacecac0f1d681059a1a",
    "signature": "0xdd4df48d3035af2b4c59ae76a1641c71665bbd93f636e2fcb4e1c0199d2d541b1705eb39841fa1ec9049753dbb2cd49cdd94a8446c880e15a8dfd718244481c41c",
    "signer": "0xfe6022590e48C8eA51d706EbF4eAe799214A737c",
    "userId": "900610030"
  }
}