{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758424538",
    "entityType": "Track",
    "nonce": "0x500177b7e11ca09ed59cf27fbb64ce047fa3c0429578a825ea22d979ae253cc5",
    "signature": "0xd4ec3c747c512bbb1296ea5a3bbdb26832a2da77d753dc29ff0be323d890ea1e6dee56f7db75f015ccde1aecf8c2eee60e4a3d3ea6e7c0d7136d2106640b665e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}