{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x23e78aa18a896624dc7e8cf3b59236a6e8f8699aa1f0de9227968522618e91a3",
    "signature": "0x58b42c9d0432bab738e9a394ebb72dfd89f5b94067ffb0202f6649393e0749ba2a1142c6e7728ee8a84ee0c9033240db3bf1b68388a8c65ba53e585ab57c16b81b",
    "signer": "0x4ABD89991f78a0c9155AbBA7F8EA2e86442Bf33F",
    "userId": "404080337"
  }
}