{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "348740",
    "entityType": "User",
    "nonce": "0x48332ce04f01e4641cc1b0118f6d511e0146a4a307b935f1285f4894e709af0d",
    "signature": "0x71c17c4987cde6a0ddcc8b553a33a571128eddd16305c7cf6e9e0f1f47933c9a2b632b150c861ac3f499752dc8e8541366969f39288dda2f80e430e083f027e41b",
    "signer": "0x6C603f7E74256e0083E35A55452e579683D3853C",
    "userId": "258645179"
  }
}