{
  "manageEntity": {
    "action": "Save",
    "entityId": "917894594",
    "entityType": "Track",
    "nonce": "1792746989457079367",
    "signature": "0x3e65a84986dc659979b3e11291991b7ddae2c0c91d3f5d1a76d95bbb749870dc09e45ae595eeb138d804e7d030b200ab322e9fd61600ec2115ab34f5592b7b531c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}