{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x7c7e41c67f329b4f6419be10f57b089865c8fc375e272646a0dbfa47e141b1aa",
    "signature": "0x3e581688443c86bc30ac364009858531302a5b957dbaca1a4914e7063312cb5d63429bc894bf1a130f8e56a688f495948ecef6ed8b87e5cdd80079bc4a7dfc551b",
    "signer": "0xF300c20BDBB459E009c4E55c08CFd33E12f8B0Cb",
    "userId": "782218508"
  }
}