{
  "manageEntity": {
    "action": "Save",
    "entityId": "1266532807",
    "entityType": "Track",
    "nonce": "0x19a4ab01c21a0c7acac3c670fb88a13a182f7a9fbf938f34254d5d203660e7d5",
    "signature": "0xc491cb63a55fb45451a5e16c1e36799bff6a816cddb8d805d9225f24af94958324f948be4cdda878401b13aa588efc7900d397d17fc64d5b9dc336ad5b8cdff91b",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}