{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9c2f30ae10f7d6d9f514ef444c2395151bd58322f79f6865aec877852d0615d1",
    "signature": "0x24401b0b8bc41e4fafa4b9c289ac0f63ccffe94ac5925763996c0209feae39543c9b3397a46c0c486232ca7f0105a2917baa7496e07a3d5a20b9404ce45cf5431c",
    "signer": "0x4B9F6393F7DB4995E29bc601eE2D8037Ec63a9D1",
    "userId": "163718009"
  }
}