{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x415b5e877fcd1f37027f901df8af857e68fb58a97827b22fdc917e69d3612944",
    "signature": "0x7522a8844cfa03ae8affb414e88113f1f0126d04043db34aeea770b00882af2d153632176582afd706e1836cf4f716c7e220ccb48201c97c9e04849c68aa31541c",
    "signer": "0x9D19f3A167B4Ec3E71B5410C5c326F6dd015b474",
    "userId": "495403607"
  }
}