{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342309313",
    "entityType": "Track",
    "nonce": "0x8390f353b64ea4a6cdd4e160732a84e5ae0ff3e590cfd14d919dad82126d0c9e",
    "signature": "0x9a3f7d495843346cc5dc2e54204f91feff1127d214379fec5b9406f4494ba22e51b2582622727a66ff6ed988dac52e686c69a1cacbc0c9f4aea5327745b63c791c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}