{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2599",
    "entityType": "User",
    "nonce": "0x14482113e9fb7639479dbb6018f31243e61ab6a35ca84faa21276bd30ae4ab54",
    "signature": "0xdf9603d16767727fd7cc6027a49496e1055cf382cd12bf6696ef4b258d939df80e936dcdaa982bc18ed74a8eacce7a92ed2a4d7b3c4168ea772472d83212736c1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}