{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "451200",
    "entityType": "User",
    "nonce": "0xa2f5c03247b044190052bbd662b076377b4ebf89293b65ff523a533e791be10c",
    "signature": "0xbb69e3657a7d123f7e9746ed3862d7d12b65ab5cb65e83f2db374c60964177544258c573f556b1bdd39ebad6567168b94d9a1766fcf24b4ef04bfbc0bbcab4531b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}