{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "103901",
    "entityType": "User",
    "nonce": "0x57557df19c45737a29a500754e05aaccb3641bf6a35dbe9652498e4c8c66fa01",
    "signature": "0x273a741d3823d2d593ef889575c97f7664f796b2677800a80d0422ba3d07e0ee0b1b60053172d9dec7f55b0814a48aa6635a56d4d15b9fd688e08ae0cdd4e4211b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}