{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7531",
    "entityType": "User",
    "nonce": "0x87dba93f4187f2b8c93406c4690377c69d3a08947cbd9a89694a8bf8ddc72169",
    "signature": "0x8569f0cd3313a50fb46f20629c6ace7cb16e3863a7bb4cdb2c3e9b9a885dfb0e4d209543c179e637c5b5fc84b97c737d597694dba71898388a3eaa4a3bbfbaa21b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}