{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xdd89569e4d54a78b38e601021f64be72495aa2963f1636bf9f8b9378322860c4",
    "signature": "0x53e34b3d2d2c297e9db997ac3e43a823733c71189c9bb68f61a438562c9ec8e131894d6fa72687a6cd1e7ef5d993d46ab5a35a681b3575ddf5da24ad414725001b",
    "signer": "0xa4A8a4853051b18e0f0f777693Ce34CF4bCe9385",
    "userId": "634886384"
  }
}