{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa86faab5674c5438e8c349f417dbf9cad16f50704b0fb785c843ea2976987e3a",
    "signature": "0x1da79e6fa12b6e3ca9514dd214a2c26f1599dcd4f4618426258640ea2859e43d334079443daf5347f5e792f00985937d0037db498b89ee7f8c1a08d449fa06e31c",
    "signer": "0x66A81E2901930977358786d0457bDe690A05d34e",
    "userId": "442407525"
  }
}