{
  "manageEntity": {
    "action": "Save",
    "entityId": "218597",
    "entityType": "Track",
    "nonce": "0xbdae86480b684ac9cae280e8261c58da71f9798ab1907eaf2e0997295f787d63",
    "signature": "0xffe9feaaef63a390f707619fdf7274e723259188d68834718719f94586beae7a64bc0db42a196b0e55b0ae4e98a771f01940abddc198b6fbc8276d996435156e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}