{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1921",
    "entityType": "User",
    "nonce": "0x28bac88e8901556cf3b68c973daaaef148ebb860004f8163d3482efed18c4041",
    "signature": "0x9388dd310d3bab4581d8b654db3e7b15b8a64967fd7a30692dca3212745ccb067d55051355d41ef5162eb1ae99c218b4853187289789ca5b5f2f36742a7360831b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}