{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "210748",
    "entityType": "User",
    "nonce": "0xd40ab02ee8722211baf3e49055a676008f624dfb56788082c4e1e241b512672b",
    "signature": "0xd9f8deb4dcaecd0241687bd8962b55317fe8274fa333400c8abd213a868dd0472c2f3163efaf4986b0763c018cee3416b616be1e303c31d45c37fcb14eb0d9811b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}