{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x142ec868d108998c130730f01928475228a91636b0dabd6f1829e20d3965fe82",
    "signature": "0x6690a5faa97ef3915f1704ca99951f0663bc05aa0d022b312d63e4def450d58640dd050b1bd3ae80acc77c5fb904ee1ee74bfd853f36d9de7474d1b97ed2c0461c",
    "signer": "0xdCaB4F12C4AddB1c7eA4531c9B8e62e393CdD2DC",
    "userId": "77868222"
  }
}