{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524344203",
    "entityType": "Track",
    "nonce": "0xc5e756fe2a283faccde68c8ff8a8b2bf2ac5b97affd65516124ac4ac79959cbd",
    "signature": "0xd76031d956337ee81392072c928b385840de44d0d55fd3d81e6e9013e2b1f8e8368d67eb1ed3f5344a41d35074d741d8c3daed3b3d4ef12faa3fc46016f7248a1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}