{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "151421",
    "entityType": "User",
    "nonce": "0x49b448a5113f0f6a223cee4b851dbfc214b5e823f47fa5b34a624cbdfda35fd9",
    "signature": "0x615a4c5bb33953adc05859006c906d0603a1562a03c3279bac4d965a2c06fe9867dddb509fe72e9a870d995e0508aa55d9cda11fc73a2eac0f11d0dfd854c6161c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}