{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309080",
    "entityType": "User",
    "nonce": "0x19dc72ba768704bd7778fbd68375c0272b1d1a3ff951b625a318acaa5a079dcf",
    "signature": "0xe0942b69321c267f747b4c268fe1e851d5d7784009c4f1901474f9729d42b6fa0e0d5d516634d497237ad10de712915f15e8acebb65ac8694002a7c196e267061c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}