{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50424",
    "entityType": "User",
    "nonce": "0x7977806329d25311e42d846d72e7899df1a259f6eaf55a26ab78b57e4ea07dad",
    "signature": "0x393cb5f0004c6ffe41fa2287e7fe8b6e4f8344aeef1c536602c82880e9dbda5959e089be8136faf498e72dd4cfdc18d04c469ae8f5cd5de45e4ba798e4506d1a1b",
    "signer": "0x4df845f0a31d75ecdeF1019e502eCEBCb209BE06",
    "userId": "742768859"
  }
}