{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "877304859",
    "entityType": "User",
    "nonce": "0x9b5ae39c63a42fcb876b527bb78aec8c4f2751a9e92a64b5f58a939ad040bf1a",
    "signature": "0x8f77de155f2ccf32312a9a15d6f6e1f003efd83f306d950dd3dfdf12b20e0783239a340c96ecdec65126da0220b9229812829904618ef64f24a7bec9e6710dee1b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}