{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378571",
    "entityType": "User",
    "nonce": "0x6458a5c3dc4d8146911592c9363c1cf034398990ec18e5f26d856a4b7e6a65b9",
    "signature": "0x2b8b79743dbe7c31a54c36dcc73ef44ca7b3235c56087bdd5e5ae53b7bd22461619e83ec334bb3f453b45a3dba168026d6849988a71c4032e9c691e6472169e31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}