{
  "manageEntity": {
    "action": "Save",
    "entityId": "870097133",
    "entityType": "Track",
    "nonce": "0x57996fcd16f3f891e483a84c7237f2d3a641782a6067cc949f3f82b05bfa3f9b",
    "signature": "0x52be1aed3b8896bdba56459a4219d027b5a5537891ad011f69d99b834d01824a075993d3540f9cbd8362501c9debf78991d61a4ccc51c778fc6d4eb6fea1bf201c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}