{
  "manageEntity": {
    "action": "Save",
    "entityId": "1266794816",
    "entityType": "Track",
    "nonce": "0xbb221f41fa48c32ba19b3c723f9e05463db069323061e23b925a57e025b1ec8a",
    "signature": "0x776b1236d061b85855872807c6b3cf39c7e006a62418f69a26a9f871dc87df652fb578d6359cd3a7e1143ef212552e93d2ca20d0f91d5036dc4761031e00643f1b",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}