{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598556744",
    "entityType": "Track",
    "nonce": "0x08a7a4df04727b63a5db56dbe67b874066bcad2968e381a77901bb339312674c",
    "signature": "0x8685a491a9c67b20fe8bce2772f812a0cda40bcecf829fafe0bf7c7f5fa29f1e3f4bfad8704091c97be319c6ae0991efb1d83e910323954b1bc3d52844e5da3d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}