{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2443",
    "entityType": "User",
    "nonce": "0xea9df9bc68b9e74487596f58511baa3caeb44d236c64d64662e4b151df9d95c7",
    "signature": "0xa7a277d9d4e24bb5874182b826e9a2366ec12fce0f70435a119c3e5888bc1b6e74dc7e9f9cbe60c73daac43e1df5cc2c559d82bd592d5ba59a5f477909848a671c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}