{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x64f0efe5eeda163929f7b1fc5dde9549f8083c9addd6b7ccb643962ca7ac5b4a",
    "signature": "0x2cf38fc8ca7e7da45f82412755e4a0b6b1e932bec5f7ee2f2b2aede86b38c8746861aea811d4550eae40b63768a90206dd9fcab52a217cb189d32b357432743b1b",
    "signer": "0xa4be019Fc4b3b5D426BFb036faAF389D8e9eec6e",
    "userId": "958873816"
  }
}