{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "551621134",
    "entityType": "User",
    "nonce": "0x0fba21cfba87d87a1996ffad0f2ee3dafa523b8a19c9f887830371d07780fac7",
    "signature": "0x81c0f3c32a1b578080765ec5ae4ea3c50afb8ff6b8827f40ca36cfd83429abff16c332399990a8c153983d3f57230b97191c8b2cb8075c14ed7f1e6e5fb8aa671b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}