{
  "manageEntity": {
    "action": "Save",
    "entityId": "1145043409",
    "entityType": "Track",
    "nonce": "0x6317ab1923d17b951c04a8660401856aa39a73926e8702d059477c01e6e36887",
    "signature": "0x1d51c331434bb8448009e9d49d399b6a461f5eeb15d49e8f6c856d653425c79f1bfe3567c9acc6fd34f1415a3088ed7e2ec8c5128b00952e18cc779f6423647e1c",
    "signer": "0x326CA1756d3c5F6540Bae1A21EcE78481b3b115C",
    "userId": "127591928"
  }
}