{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "500072192",
    "entityType": "User",
    "nonce": "0x0132ce5c7b953023b6cb139c873b76669bc82a238e5d4a8b39c6d9d1e95479de",
    "signature": "0x343cffc6d5ac06fe5ede78d413b9bf41bce8d256a840d8975856ad4dfdf0cec05d0eae1dfd4968d2d5cf6edf9cd45f42a9cdbda4198b0a09e1d50dfdc0cbf4ba1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}