{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613763010",
    "entityType": "Track",
    "nonce": "1786556061787035010",
    "signature": "0x4e511e223588748f18c1f45468adcdeb067330ddf461f70bac05bbd3c98f790363a8cf87be34a2cc2b6ca9beb5aca564e0d424a469532b2a8a415f2bee29ba2a1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}