{
  "manageEntity": {
    "action": "Save",
    "entityId": "1034439588",
    "entityType": "Track",
    "nonce": "0x20e287e4c8f7913ecad7cd693afe22a38e60e1ee787967de676cf12c51525b77",
    "signature": "0x0f7ad698ef325252ee2d19efad8c38504e01473750fbb5ebe44c5a2c06cdb0e312834585bd1ce9dae97a3e31a2e6411485bc2518fe6afba38e147d89fc5f93361c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}