{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "152450",
    "entityType": "User",
    "nonce": "0xd551ea3a219ef08aa2407e8a0d051da5695f5480d9dbc166c9ae1bb043c242f4",
    "signature": "0xc10137b82495b2f1b2dd738a0e3ff1aef7a798ea7000a8d81c17e173b62fb81064eea2eeb188d75adca168aa02b520c6bb3eeace7dbcc6ea3bb25966723b9c3d1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}