{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9c30974feec30628ed1d21a917358a0fbca66ff219ec8cd82ad385c085ee8bb4",
    "signature": "0x6502397506c8adb7ab7f3b8f6f41dd6211ccf65dadf9c4fc86866ef8119725122c64d3304e5080ef85bd16717481e0ba9fc42095aacf8e9ae12ff864674d15821c",
    "signer": "0xF28111f00331ab6fe0FD9EDCeccf86649C599c04",
    "userId": "598288959"
  }
}