{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "971578908",
    "entityType": "User",
    "nonce": "0x371df39d11944bf8f92bc19eb5bd0cd632231a4aa713240a8c128c894e9d5c80",
    "signature": "0x668abb2cebdcadfd8b7ef0a1ce3d406f74498cf26f58f4e6cad5cc3faa52552d529cb31a3f5b100eb8bfc581571e8fab9282b66f2ca636ae657e3282b0e55b761c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}