{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "545427662",
    "entityType": "User",
    "nonce": "0x55a3d8cd938d4b6794a81efb46a7dfc966fa1af6690efc1f1705f23a471e73eb",
    "signature": "0xd22c283f8fea5b400fb9a31e5cf0df9526dbfa44892e2630be21ea331236902e1ef38a261708146eee5f9591e8cdd69132112aca567a341adffcdefbc4a7cca41b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}