{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0xe8276e901cf3bae7ba4b9f9619f74728f32cecfc0094046f23c6cd8b58a6d6b5",
    "signature": "0xbd6157cb9c11f8b28a66d4e2f95c794ac2157a3b6e66d1a30ba9cd11577eb3b54ece5183dc918d2a060654b53c0efc8ee6eb4f3e31309f28af05393de8499a011b",
    "signer": "0xD7Db519a2A03374B0548c02822bE88402aef1E5b",
    "userId": "715241773"
  }
}