{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x96669087bd1c5b3f93303eabb9c750262d14f761a58af8e991b77338057d5624",
    "signature": "0x8bb3b3c32840d07e8d99424c657c603d7ecdc66d2e0740a091010700874244550e8b6454d1f4f198d85de233437d2187b85bae89940ecc6b3199db86028150031c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}