{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "764248678",
    "entityType": "User",
    "nonce": "0x7cb5081b76c74ceec40de80179d7c59f3ac5b1f9985e8a2d9b0d85cb02e3131c",
    "signature": "0x325b4ba6d0ad937a3a72b5fea104e08f22a0f0d014e9551b22f97b0c68503140331562ae2da767e6d80db232b27b3ed490d1f32ad60a94705314e992cdeb90711c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}