{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3423",
    "entityType": "User",
    "nonce": "0x250f56b468ff77112f6fdca8efe847e289e77354883c5fcf1dce1ff20e44cafc",
    "signature": "0x271f322b31d9e3d25364a0e0f7134f2d43aca75111ed3f7949abd5b62d7961a9290cad07c407a2a538a0512e932fd6ec2101ff0481bc0fbccbe1ce51942fa2711c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}