{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "213208842",
    "entityType": "User",
    "nonce": "0xf90e3642faa0ce103782af6a942644138e3d2093abc4cfb55becacfb8cd0fcf7",
    "signature": "0xb0b3f7a073ef64fde46def0db48f6f7a3b24387cabec2504575d55f9d2d6b9ee40c4e1b92d84a167dac7ca9e290c4e89d7b0d909825711c6081cd1e50df3a87e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}