{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375577",
    "entityType": "User",
    "nonce": "0x845b29ba1f737b4c69ad1fad675de1e0b9ff58a1d73c5f5a922cfad82e18433d",
    "signature": "0xe3949910f0c6b69ba3c78bd0e60972dad62e072f7d8ba39b7977f94f1042925354253524af9ffe26c7c3d146c371488b0489920002fb1b0ccacbba9b0e4409121b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}