{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1640466",
    "entityType": "User",
    "nonce": "0x450373e46ae5a1959e7dc83c155132d3f86e4d0f783b4eea927ac4e0f142e027",
    "signature": "0xd6a6f5525f092c25f7a38dd8914690d67d309b3a453907a160a1be63bd4e748417c631e4f18ea24b41a6caaac5dceeb92d95c6aa75fdc9207218135d92270b861b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}