{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3da7a55d86b27c2a06372161630104e6f909f7681c68378aa25f6fe32568e201",
    "signature": "0x39da47d61cf39a2535ba912d7998890bb34029c1c0ef79ee9951d060336d33c70afc14f885baa8476e713804def644bb4c4eeee290950504f7652390042f25e11c",
    "signer": "0xF6d7F4477a02a1b5D3fA0991F1af9807e510Aa93",
    "userId": "103534989"
  }
}