{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x721674e9960d30c7216ce9f965ca415f7c3143a97cfbf6de20b7932aee1f8354",
    "signature": "0x9feaa8429e64b957082ca3848ee6a4883c4c1c9dca7e0b81996ed0c524afff82783f064c532cc66fdf32e00c504386a36c142fb941ff85c6166e0bda8360635f1c",
    "signer": "0xdF9487164dE2249ca747A2fC5A6dbe6D6392F510",
    "userId": "308281501"
  }
}