{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16377",
    "entityType": "User",
    "nonce": "0x37e4b41a2bc48de75710d21145b8dc8fb334480fdf06946e3648921335bbf7fa",
    "signature": "0x7180182c6f5c645e53525f834bd86ca313d0625abd8010b032a32d741b7b76b56cd3a45f74935da7c3c77d48ae948c20731aea6b67bb35bd8985d77dcb39e0f91b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}