{
  "manageEntity": {
    "action": "Save",
    "entityId": "916428852",
    "entityType": "Track",
    "nonce": "0x1a517d5568b0695c5765e3f060198679e9a7c1465629686ac81ac99f1caf70f4",
    "signature": "0x292393323a4ee2dac05ad163ea00c3a074e331fff5d7c6a946165987a4ff2f0b296675e117a1ecca0cb82c8a53e743a295d3cf037d5cdff3c09d6947776b16601c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}