{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12615893",
    "entityType": "User",
    "nonce": "0x8f8e016ec44c7a79eb7c8ece98ff20de737efb62054f9ed274737721f5584949",
    "signature": "0x8909d3bfaf49875ed3e8304a5b91c7237cf0e8449932f57c18612f58dabfec3975ff757b37db3c070e7de193a058bbbf0a4ea39f959a3f1874c3132d3faa0b9f1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}