{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x37ad0b07db53bddb23c4f747c1dd88b8a8400ffe28944b348c1d3795a5815920",
    "signature": "0xd6885fe0842523e576493b95704a6bd7bb0d6968d7225e52f266ed1972e0a3fa71e66841ade0afaab6b2adf0d156b4e8912ebff01e645454dfe0aa36499876401c",
    "signer": "0x5EF3c864B81cEcf00dA78aaFD423E76cf877A012",
    "userId": "421807263"
  }
}