{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862664781",
    "entityType": "Track",
    "nonce": "0x7a4e4848141e2faad0a850275522cf8539a2c4072b2de8dd4efa8341df96716a",
    "signature": "0x18c5d5a9bdbde11269a39b60b58ec51e2d59af55621807b7a2b55440250823a466c7d263e4a0267f5edc0e432999fb98fb288b74295da54116a54a4521fc62881b",
    "signer": "0xe5438A08048A3A712bAD9e7882867157630CC4FF",
    "userId": "810146956"
  }
}