{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0a37231e6f530c3a28fa853d844b1fb1a776795b90d8248793725c037d38e5d4",
    "signature": "0x590cf75f06c01686b336a39b109e9d3454a595786778acae35e5fc49bcd6222e40b97b58edda8e48dbf2b2338818526e44d80270a923cd32b214a7bdfa1b062f1b",
    "signer": "0xEC2B62b3ED30F5dA0fDA3f6B0379A9E9dC236921",
    "userId": "505474937"
  }
}