{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "399822794",
    "entityType": "User",
    "nonce": "0x47b73afea4cb616be4209f6b71b17f5f08694607d4db3209687f8ee9e8a61a39",
    "signature": "0x7e78c71d50fbb29c4c4249d2f3f2a3ec7d44a018e5c54c63bd14463b4640c81f514f6614e4b4b5f023c9ac9a1e5af7663815a6701cb5b3857cf99af61f7bd4331b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}