{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766892114",
    "entityType": "Track",
    "nonce": "0x53ad8b00db345ae4ff59b6816c161a4b464e00e51fb85b246fadbe44a9d46258",
    "signature": "0xae47428befe12ba96554275412d36eb207c862d3bf74c448cbcada8fda6655d56f87228494a134fe8456b6ab73ba15baabac8d1d1f4a633e0457b6420d7aa54f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}