{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613954204",
    "entityType": "Track",
    "nonce": "0x95af52698ae95334c96cc56784c699d354ad4fbac744724493c75054dbbbf43a",
    "signature": "0xbcbb48d61bde90962f93e4efa51ebf8180c80cfe014ffa829d4164ae3829ddcf71111ca0dbe8edac311a0aa797100363d7c090b7651e452a4446c7eebb08ce6c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}