{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "486490947",
    "entityType": "User",
    "nonce": "0xc1433db4d7a4eb4bc134ef8580bc1d590e6a3eee7f0e4a8452dec174eec2a3b0",
    "signature": "0xc9a5c03b04d3c19769e1437e42dc02ea471f6c03ddb4f475ed948c32dc6628976d65ef3c0a942550636da93faf2b6a425177ac46a19a03efd6afa142d78c52a41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}