{
  "manageEntity": {
    "action": "Save",
    "entityId": "1364364158",
    "entityType": "Track",
    "nonce": "0x23439b66cd586c89756ffa86ea9def55c51c1208d7832341cb42e7f3cdccd918",
    "signature": "0xa8303c0c756802f3c1c144d386544fa8ad9c8bb602008017e53d10a9714592c63f361b89111346b6d8bc5f7e6f69c20bf9746425de0b063598b4eeb940dc4b2a1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}