{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50603",
    "entityType": "User",
    "nonce": "0x900bce28530b794fbd9e067a4471cbe236538330f1483d5bd38fd49390a90972",
    "signature": "0x946f2333a28037a49aa4eea89e4769176710dfef12d7bd1a161406e55a853b0829c3dcd83c41b9063ec835937db14f7b59a0fd195baf39b498889c2e298d1cbe1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}