{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "522150766",
    "entityType": "User",
    "nonce": "0xf34e7b7f7ec3ed53093332da841c5b55eb6cc929ffa677e901c269e7e276e914",
    "signature": "0x66f20839ebdf3576eed5e503b57f128e948a9ef997471410880877c0b0d8e00b4500476a8361c2ca04783d20dbeb1bb4e94d2d87a62040311715fb5128b4cdb81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}