{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x378d167b4f792e8d92f6d911344fb553b3f226c602e54d9054a63de874f07a80",
    "signature": "0xd8ac6a131eca6c3568777ed45f4b4e11e00c92e79c1bb705d54c530ba8f941242816bf3a26b54901307ab2b48a9771e9f333d011e8e981f0796ea8340232971f1c",
    "signer": "0x55A4f450E154CFC8D853cA521F452162C3881349",
    "userId": "748511997"
  }
}