{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "864400174",
    "entityType": "User",
    "nonce": "0x9f722962aaeb155026cdb1c936607cca2f8b7ab5a66f59915d64dae5ef289881",
    "signature": "0xcd42db37e59886098ce5026f3ced2a7efcfa63bff74ce6c02feede0d2befe3d02a497f35f0e08b3aec84c8c005cbea806ea9d962480b16f8d130cec4639684091c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}