{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "449002461",
    "entityType": "User",
    "nonce": "0x4ecd5cec9b4c52f8727a19d33983863de9e2c0c42a6299a6aceaf26746553cd6",
    "signature": "0x7e77a7d54e4a095433208f08267839efda4bd1fc0d27f2c15d7d069b6adf8e450af870a213fc3270cb92fc2d05d4c6c51429b7b655f3ea4c5f4f2e47084101371c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}