{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255893436",
    "entityType": "Track",
    "nonce": "0x02d2e7135d3146d9f142b5e3ed49e8644ac959344bdbdf1057162793cc970123",
    "signature": "0x9d758566c767c74f9cd3cde87a5f2757044c24c07f22b321696b986ade7ec0fe4898d54db1fd1f53725b9d1ca3cd311598f3499d2eadd04f45dcdc54d4522df81c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}