{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16564",
    "entityType": "User",
    "nonce": "0x5596cd98e6e37e064b9b22a475a68ddb4fed6d0427c8fb78826c58c84f368510",
    "signature": "0x99eb35e3213c2ccc61a9326f5409d3b5e6597f6baf018f4944fe332ed80bfd2f066d83641d0646c70c0e1571ba4b2259e4f156adfad2b38da6986095e4727e5a1c",
    "signer": "0xb7C7a8D9d12EBd1Cd438cB065E97280E6D7e912A",
    "userId": "984691913"
  }
}