{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xac67f02074d041d4eb4bc99accc28c86c831306d7f9c45aca511a1a7e756ec4e",
    "signature": "0x03553d26fcbc13c49d8eba98391d6599bbb4c96421b71ad72a0ae057a2d8d18b16b92a169a73c916ba7bf380e1643ef32a6f7bc38ac426ae4ee821b6eb3f579f1c",
    "signer": "0x21DA8B4597abF9b1BE7943096E8dB359E5c09860",
    "userId": "757186547"
  }
}