{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1aece00dfc501e503110c69559882d386eece154655e387e2bb762bf9d6efe59",
    "signature": "0x3cd69b7c9e616d173fd5b7aa5607cc34b5a7ed21d5a47319e7e5a9e1408e7f7f1e95455e5b5322ba47ad1f9409799ddf4108e3b79d7bc78e998f68cc7781c8b01c",
    "signer": "0x4ebEA1a76c7C40B81c2328CF4ff5D59919B4A040",
    "userId": "458608304"
  }
}