{
  "manageEntity": {
    "action": "Save",
    "entityId": "1351976220",
    "entityType": "Track",
    "nonce": "0x96c9526e7640ca9406df510d4c4073b75ac26c57f98365a3892445f1501fd82c",
    "signature": "0xb6c62ada5d68dc245e4664421ed72fce74ef0ca5105fff80159b4c0234d7e8cf4ef3e2d73510dcd141b9f87225830864056c9cefd89a334c81deb84da0acbe0f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}