{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "298753539",
    "entityType": "User",
    "nonce": "0xc174723906bf398935a1fe19cacc954245414dde5776383e642246f6473482c3",
    "signature": "0x4f697e5983865052f443f2eb13cd684e51c7f24c3a8d71a14c691a8a86af4499637f0580dc6d793766cc36455614869ee8ae3be630a4ae4da672deb4ed6f95b01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}