{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd979780df0559416b91750e2a00f3829fd15ad37f2c0f5c4e7445478554669f2",
    "signature": "0x13f058dced91c8efcabdd55271c93b47e9b7992ada859e6a7abacad37b19a7551dd278b225a5b9096e2a97ea51f3b365f0cca4f17ea8b06b551ce7d1303e378d1b",
    "signer": "0x3e42Ad15dCf9b8E2F96dCE241372B60a331BB45E",
    "userId": "44304402"
  }
}