{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12519",
    "entityType": "User",
    "nonce": "0x4cb837ccef916fb57756caed4fc988f6d5ecdd00d675e8d81a9456c00488a6aa",
    "signature": "0x916ae1547c05bc5c5a9a2237a175862e627f0bdedbcf315f937025ee3c84a64b0830853a1a2c2a35508c740ad8cbbdb31781fc424d3bac11540fbcf142ff5e3a1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}