{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306721",
    "entityType": "User",
    "nonce": "0x684838fab357e60342c18a8b78400d3306ad20534cfc52baf6a1a6c4f6128429",
    "signature": "0x2b621402b63a12f054099f5a815ae11f8e8e29ebeaec1ef5a1972e9e5bf06e371441a2d759ba9256f7146c37f358b9c378c7020b5aafb958dfa160ebd47ac4031b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}