{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x395fbcafe10a6a5e0e6937175251d301123f74bbabdf0f0faf7c4c30a9118e69",
    "signature": "0x544c982ccdea365eb7d0fd0e64223d8c374fcceac6a73837483f7c9c837e39d02e08a7a74f3536604afaf8af05f5b2f46e3f94a688c9ac3b8ffc2eb70b69221d1c",
    "signer": "0x3CE226b3CA677B312E9396cc48d4008c70545091",
    "userId": "550328673"
  }
}