{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbd8d9d90afc42991ee71ae1a03c9a20d1679594ea850f654aaa2c5f9817b5f3b",
    "signature": "0xceccfdb096b6e6af86085876c11200919b75ecf30adf5dfadc3f96a7134f99fb2b3a841e88c6cecc92751b8c381cc5b3128ab3d864940de912a2b439bde5e9331b",
    "signer": "0x2cfBA45e5063d6aCD9f26Cf21490FA2e7e45fb54",
    "userId": "393021518"
  }
}