{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508263176",
    "entityType": "User",
    "nonce": "0x7d4d698e0d5a80d872f8a4e384ba1a6bec200a848128784b3df3b2b5eb68ffc1",
    "signature": "0xf152acd8bfdd47306211ed250ea694310c1ac914e9a388557f243666523af4945f33ac1c80267a243d5f06991f0742dba71be4a07405e794f1f44b26736551ba1c",
    "signer": "0x1788E4C39d3326e598F16767C69826869594E359",
    "userId": "116504833"
  }
}