{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900325196",
    "entityType": "User",
    "nonce": "0x00bf57f1a8d3ff261ce4f110e71d00f130d703221d32bd273f0d9f06aae00735",
    "signature": "0xfdd8db1e8a1b1f85c2b82f30a616b2faa158067f02992857d3149844b2ab8d3c4e0ef2525828d6bd860a30a2fd53cb411057ac413b4f0f96725b28cb0ef380541c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}