{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670831",
    "entityType": "User",
    "nonce": "0xaa38d3a29307129bbecc084de946e1766b81c4a7a3927febfee9b2a22de33070",
    "signature": "0x1f1d1ee96549cc0ffe58c5f370438e87b05b528f49b75254edd5f70a81b0553e7f1eecb6dcbc32287d9dd35861937b5f7c80c3f69c9024187d013182b7e8c2921b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}