{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910983949",
    "entityType": "Track",
    "nonce": "0xf7a64f325f7fe6b6f21ddbbc62881a1e68286517e7e8ec45b49db069228e68d0",
    "signature": "0xe7480677ba1e4ea226fe94fed5a35f17039e4ef01d08cb143b046ad29e382b5d1acbabb4080a2ee824d5bb1b6b45b0fb75cb4ca10eb8ac9f06ee0ee28c2c88141b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}