{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "163171",
    "entityType": "User",
    "nonce": "0x2a3df89cd424ee1ed2703ca4ab9246db458aaf51c06554de7bc29bda0551ee5b",
    "signature": "0x33a31262f4c896d2596df23324083cac0088b062861c5adaa06028abc9171c2e7d93d16085174131184093731f75e691be5dd736e48f94b9facf103a675264b61c",
    "signer": "0x621C1ffd4F2D9c750A93330767C1252dBa68Ec3A",
    "userId": "187371220"
  }
}