{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390891465",
    "entityType": "User",
    "nonce": "0x5929fa383432e584a115b441bccc2dc5caf904ca1ebf63374fba5456b36eabb2",
    "signature": "0x3ed806fa9654b9d8d740395a8c8a0c518d8fa284fc656877d974484b198f987561cd458da03286d49a6b04f642706cb790193f62056a66ec26d261730bf8ca951c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}