{
  "manageEntity": {
    "action": "Save",
    "entityId": "920265242",
    "entityType": "Track",
    "nonce": "0x979ecddbccae5fd98d41ad07c512e8dbf18391e209b1bc1880173acfb3ddede8",
    "signature": "0x520aeca57d59fc64c16579cf6476b267b6f60a84315f589fb0596f24aef1c3293220dc911bd59bed052a16873788ac618c89fb4f0b163d00247a2032cf5db5411b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}