{
  "manageEntity": {
    "action": "Save",
    "entityId": "463283213",
    "entityType": "Track",
    "nonce": "0x6ca257a5b7d26c99efeebab2356ee275dfd3d730b7b0f72cd103ede713b8c87a",
    "signature": "0x1e195f88cee6f5a15f0b9a5225266dc1f3e22ce4e18c82c4bb36e670b9fed2fe72d86068dcdb9f1d43139bcd24ee5ea1604273653691206053e09329877c8f8f1b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}