{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615051605",
    "entityType": "User",
    "nonce": "0x3385bfb9189e9d70ea5812adc7e9444d825fa918239fc1d0bcc23f7bd692b8fc",
    "signature": "0x9e4d53dda29407eb07e9fcfe53957a6837dadcbe87857b7a0c78faac0c0884802f3ab42107bc14171e0e7800d7c4e86191d02ee8cbadf14ae5e60645c81ea64f1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}