{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "10449019",
    "entityType": "User",
    "nonce": "0xd9c54e638c3dacdf5055b110a7952f03836332b6c03782ee70b707df7708598d",
    "signature": "0xd8660a3901a32b578bcc08f303b9be63a89cda679ccfd816513140a125c412b15026f0c383d95e42d5e968054d36ef1e4a27533aa7094fac38f63cf772a7b1e61c",
    "signer": "0x720537125Aa4b451266209E0d508D7576a4bAF94",
    "userId": "942771296"
  }
}