{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4429",
    "entityType": "User",
    "nonce": "0x2172dbd501154eb874ab16a4222739d35ebed3fc5195123fe5caa30160fe2513",
    "signature": "0xfac0d3fd74d5d372ee8b38b84909476be660f0f694b9f297741afae7e55415a16891f6188a115d02c7f6a909d20dccb2ff2e745b26fa01bf65b9fee5c7aaa7581c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}