{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121458",
    "entityType": "User",
    "nonce": "0xcbbe2ed223fdea5b3beb219421032c5a1441dda84919164303155c245289e5cf",
    "signature": "0x3b5e6bba5bdf07485818e9342063f45354ca07f5501ecc5894fd179b7e70e5846f3f545a4fccd0fce0c6059289fe43c8240ec837e2a8fb3a44a4f6c3b48590361b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}