{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "821421961",
    "entityType": "User",
    "nonce": "0x1f6282b68ba3c90483ea30d78c3dcb300663a649b4bad048e8dcde155c54d81a",
    "signature": "0x7b7db52aba56aa46645b30baa8d2c9cb49614be305b91d8f7e44680f71e48b4e2cec867a187e5f159bb732ce40e0abb9ee786dad8f54d278e4e2244069afa2ec1c",
    "signer": "0x20cf64B9100CE16584AB6185C01CB9BCE51f9785",
    "userId": "485084535"
  }
}