{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463691836",
    "entityType": "Track",
    "nonce": "0x91ab974d96d06f701798620eeb4bbd131f3d3701ae9e409f606751d08161dfd2",
    "signature": "0x9028c674264b89f50bf0ccc57e1edc40a7a5cf7fcd53baf5338883046c3f1c242347f124e7434ff62a2e83f02489b727d41aade58bc11a7d00d57f13cdb8d9921b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}