{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x57b17c90600ec2a094f8beb1212e8dd41e0394e5cc5e983f13a9e200a98ef008",
    "signature": "0x2a4073258e92aef542520be8af948b3858ef7f413a3adb3992ea986213630bce48b73ac3aea4c0f4824f8ae56df13db8b06c5ff93af5fafc621e5ff248be47fc1b",
    "signer": "0xD21192e92319319249f3df55efE06b0809861c8f",
    "userId": "924892254"
  }
}