{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306850",
    "entityType": "User",
    "nonce": "0x034a5c3def6b569857cd301ea2880d8d967b5de8a3b454fbccf85a1aa04f4ecb",
    "signature": "0x0cfc80da21efc16b8fcf0beaf01b2b3ebe4af45333aed792d39dded0399d10a059381dfbb579cbc94315be889464370abfefa319bf465fb6c223444f9223c4221b",
    "signer": "0x57f999a08DA6CFdA393DD6851EB6899a3CC9AB8E",
    "userId": "262486005"
  }
}