{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932821900",
    "entityType": "Track",
    "nonce": "0x0841113d95000f140458a0ea52374939aa03efa690045b7e5b97014b0547b962",
    "signature": "0xcf7864bc7ec9abb25c08fb540521c3dff18322401bb98bca1fb7cd29be022c430a6fce18b3c40095e3a3f1e45793914fdf84ac358f787040408efd29f87afbef1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}