{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x43e838dfb92cc8c8d3dd29a5a64f3646deda965228ce970bf443b0fe1203de1f",
    "signature": "0x6695aae4096949180d51e6fffcf2c73000dde7af8a2972aa0bcf4a6adf4500c662dff30439691665ac5cb6a9b9bc0638e76f4250c096bffac3ec19968f69ca251c",
    "signer": "0x87f8538D39d3B2C6ce4d4343De4b6Aa2d5e75676",
    "userId": "138655938"
  }
}