{
  "manageEntity": {
    "action": "Save",
    "entityId": "1149474080",
    "entityType": "Track",
    "nonce": "0xaed9bb18a23a53b18f2363c5e7da48ca8ff67660fc70b24dd3d0f17efe87fb48",
    "signature": "0x9c43fcf4e6530b64da80f7c1f21c9ecf12ed66e0e3d8d977b119120ee676edf777fbc6f103250076660aece228c05d7f2ce80036666d6114fa4f539e96d80a091b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}