{
  "manageEntity": {
    "action": "Save",
    "entityId": "39374090",
    "entityType": "Track",
    "nonce": "0x24b64bf77b058f17f164db5ee8b441f2159e6898d73fb48803888c18a09aa473",
    "signature": "0xb542f26a0ab811da9db90f0451980c7be9dff47d5c04cf5825327a991de684532601e1d17faa67b141f2d65516235b7610977e1a74949713da2db7e1009960291c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}