{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "143269",
    "entityType": "User",
    "nonce": "0x507d3c6d73991aac8d0664653427f7366b61698ab73723ad5b47ee4b991ae208",
    "signature": "0x27c5a3d95e326f61ee642bb8e1b32f18a3d6b8177a851cd9b87233356f92efbb59bdec0a0d36aaeb4652a018056a8ddcf9ca53eb018ef4644feb1e529fba727e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}