{
  "manageEntity": {
    "action": "Save",
    "entityId": "962398019",
    "entityType": "Track",
    "nonce": "1786364997508582193",
    "signature": "0x89b29a7ab57368af80ff3dec0597a45348f813c2df9c0732fb487cd95da96f2a01ed8200d9606136c412c5ed428a2c60e3a6937feb074e35fc0f96d3639b0da61b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}