{
  "manageEntity": {
    "action": "Save",
    "entityId": "280466613",
    "entityType": "Track",
    "nonce": "0x4b81a3ac5f3a4405174aebbdb866558994e376750dc8f9fe61fe244a23c73c72",
    "signature": "0xc7600b74d4d2c4d7cb8f93e6916adddbc5a9121af48f541d1bf2564e2dad0f011814d9608fcd69dc611e6f91270a1d8c1a9cecc420b611ece1788f6adc9a9d101b",
    "signer": "0x8FF85C5AA450a88f13FbD5170e24E2a3eFF32518",
    "userId": "311829956"
  }
}