{
  "manageEntity": {
    "action": "Save",
    "entityId": "22157",
    "entityType": "Track",
    "nonce": "0x44bdb9aafac5b8ad00d09b28f56dd23603c187979326abc9313d483ddf9b6406",
    "signature": "0x045fb3eb84c361c0d925dbe969db173aa21797921faf73e15f7181619f57ade10448d90ea010b1ee4a6737308eaeff7b839992931d609e292cd555f1dece75f01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}