{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1591a9edd60c63ed631dadf228f9d01324d28e28427dbab47ccbf3cda719b77c",
    "signature": "0x72cf9d144fddb1e9b0e02adb8e588abece183932e40548269a064a4b7c4d867775811ab592b9604cc08738b395a8b1ce7efe31d4a7621e1c0528fd7b849527b21b",
    "signer": "0x2230770EC85946F97685aDECD4b734f51662F050",
    "userId": "887741865"
  }
}