{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42973",
    "entityType": "User",
    "nonce": "0x8461934dea5b144dd9609d1338062a8a8f55d78b16e9ff075726cb766e7f3086",
    "signature": "0xcc1518ca72054804c850fa0aa34bbff46adb0a833270bebcfc3d778d07131d0c2216e11af0c74e790b39adb3dda007d93ab2699e320424ddebb63836f337f1321c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}