{
  "manageEntity": {
    "action": "Save",
    "entityId": "1430493632",
    "entityType": "Track",
    "nonce": "0xb995d0d0ea2a55755942649c2b42b1734a86e57aa6a374fca238252c0ad6052e",
    "signature": "0x83da66ebf262b0ce4dda38ac8e8476fb1a9d3dde4e966757c9fbf6f8c894b56700f5f7c5b6e902f7b52c93c8763411e6ce52bf2b429d30a12fe185a4fa4bc4291c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}