{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423422344",
    "entityType": "User",
    "nonce": "0xe67897404e798f8c686be58c9ea14b85277197f7ac9239b67e28a225b706dfbb",
    "signature": "0x673bc7f06a0de584fe12fcc0fb24b18e30c06e74b81fda8b0334b13a1bcc94f71a104f5c849ae5861e94216da1f8c441df53f59d6fbff70c6286204773ccd5c61b",
    "signer": "0xF90E3C36E315BeaFCCb2aC77D5050899dc5E4A35",
    "userId": "154877636"
  }
}