{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0x12cca62416e1b0c3dda2aeaf3b94f1109744f2f31d24ec5da093125a82304de5",
    "signature": "0x4f0f6ec813836ff2cc71a12e531841c31d0a657954adac359bded321fe7b9b8079cb1aa8e4ccbea5196896896935f1b7254482d37f6f2fad47cd55caf3d048051b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}