{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x83537a9628a2225dee5d7dd6468c8d70bc2b1afa0b04870588bff044d7acb6fc",
    "signature": "0x0ac374c6d5745ffbe9db2899ade51de0556e1db50d87ac9407fdccd282f40b1b43efac8e7a7a384f4a62f50cb756c8e798b626ad3cfccddeb2aa9d0a38e980401b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}