{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50623",
    "entityType": "User",
    "nonce": "0x24c18d3f49d3d05cc51caad93a6846b384a0e5e37d08ec6248a9654f6b3c4f0a",
    "signature": "0x99c5f6613db31323e9ff845613e366662b5ddab3232a4880dc85b7cc53a871a11b2c647d2a6b76e2ac150efbc1c3a4983e8421a7ba2a356dc6ead490cdd7c6291b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}