{
  "manageEntity": {
    "action": "Save",
    "entityId": "252060",
    "entityType": "Track",
    "nonce": "0xbdcdef84e82d75b6cb031c28530433c64b8f5c775b40915f26458daaecece11c",
    "signature": "0x0722f6df51522f3d3a14063de11690436d1a7f2ebf8b5d0355066fa08095eef8141165bca085e9b4342ed46f0724d86c98d6423a2c09332a9a5f0dd7275a42d81c",
    "signer": "0x95053e208ed4683dC71E3025336b339dc6C13f1B",
    "userId": "90610656"
  }
}